JPH0685085U - Photocatalytic reaction tank - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a photocatalyst reaction tank that is not affected by the weather and time of day and that does not require the photocatalyst recovery operation. [Structure] A light guide plate coated with a photocatalyst such as titanium oxide is arranged in multiple layers to form a water channel. A condensing Fresnel lens group for guiding and irradiating natural light is provided on the light guide plate, and a lamp means for guiding and irradiating artificial light such as ultraviolet rays is optically connected to and attached to the light guide plate. These may be attached alternately to the adjacent light guide plates.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a photocatalytic reaction tank, and more particularly to a photocatalytic reaction tank suitable for decomposing and removing harmful substances contained in waterworks.

[0002]

[Prior art]

 Conventionally, it is known that photocatalytic reaction is used to oxidize and decompose harmful substances such as trihalomethane and pesticides contained in tap water, or odorous components. This is because photocatalyst powder is mixed into tap water, and the tap water is run so that it is exposed to sunlight to perform decomposition, or tap water is irradiated with artificial light such as ultraviolet rays to decompose it. I am trying. Then, the photocatalyst powder mixed in the tap water was collected on the downstream side.

[0003]

[Problems to be solved by the device]

 However, in the conventional oxidative decomposition treatment method using a photocatalyst, either natural light or artificial light is used as a light source required for oxidative decomposition. It had the drawback that it could not be decomposed at night or in cloudy weather. When artificial light is used, it can be decomposed regardless of the weather or night, but there are problems in terms of equipment burden and cost. Moreover, whichever light source is used, the photocatalyst is used as powder and is mixed in tap water, so recovery processing is indispensable.Therefore, recovery equipment must be installed and the size of the processing equipment must be increased. Was unavoidable.

The present invention focuses on the above-mentioned conventional problems, and an object thereof is to provide a photocatalytic reaction tank which is not affected by the weather and time of day, and in which the operation of collecting the photocatalyst is unnecessary. There is.

[0005]

[Means for Solving the Problems] In order to achieve the above object, a photocatalytic reaction tank according to the present invention is configured such that light guide plates coated with a photocatalyst such as titanium oxide are arranged in multiple layers and a water flow path is provided between the light guide plates. And a lamp means for optically guiding and irradiating artificial light such as ultraviolet rays to the light guide plate, and a condenser Fresnel lens group for guiding and irradiating the light guide plate with natural light. I made it

[0006]

[Action]

 According to the above configuration, the light guide plates coated with the photocatalyst are arranged in multiple layers, and the tap water is allowed to flow in layers between them. The light guide plate is connected so that the Fresnel lens collects the solar light and irradiates it onto the channel surface, and in the same way, the ultraviolet ray lamp that generates artificial light irradiates the channel surface. The light guide plates for natural light and the light guide plates for artificial light may be arranged alternately. This allows the Fresnel lens group to irradiate the photocatalyst supported on the light guide plate with natural light during sunshine to oxidize and decompose harmful substances and odorous components contained in tap water, and use natural light like at night or in cloudy weather. If it is not possible, it can be similarly decomposed by artificial light from an ultraviolet lamp. Since the photocatalyst may be carried on the surface of the light guide glass, it is not necessary to carry out a process such as recovery work from water.

[0007]

【Example】

 Hereinafter, a specific embodiment of the photocatalytic reaction tank according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing the structure of a photocatalytic reaction tank 10 according to the embodiment. As shown in the figure, in the reaction vessel 10, light guide plates 12 each having a surface coated with titanium oxide as a photocatalyst and coated with titanium oxide as a photocatalyst are arranged in parallel in a standing manner at regular intervals. As shown in the figure, such a reaction tank 10 may be arranged by connecting a plurality of units in series while being partitioned by the partition wall 26. As shown by the flow path 18, the tap water to be treated is supplied to the first reaction tank from the interval above the first partition wall 26, flows as a parallel flow between the light guide plates 12, and then the next partition wall. It flows into the next reaction tank through the gap below the wall 26.

A means for introducing and supplying light for performing a catalytic reaction by the photocatalytic coating of the light guide plates 12 arranged in multiple layers is attached to the upper portion of the reaction tank 10 forming the flow path 18. Has been. One of them is for guiding sunlight to the light guide plate 12, so it is composed of a Fresnel lens group 20 in which Fresnel lenses having an inverted triangular cross section are densely arranged to form a top plate, and the other one is ultraviolet rays as artificial light. And an ultraviolet lamp 22 for supplying the light to the light guide plate 12. These are alternately arranged for each light guide plate 12, and face the Fresnel lens group 20 for concentrating sunlight. The light guide plate 12 is extended above the light guide plate 12 that faces the ultraviolet lamp 22. The UV lamp 22 is optically connected to each top of the lens, and is located in the lower gap of the Fresnel lens group 20 so as to face the end surface of the light guide plate 12 of the end scale. The ultraviolet lamp 22 is surrounded by a reflecting mirror 24, and is set so as to collect ultraviolet rays only on the upper end surface of the light guide plate 12 which faces the ultraviolet lamp 22. As shown in the figure, a plurality of such reaction vessels 10 may be installed adjacent to each other while partitioning them by a partition wall 26.

Tap water is supplied to the photocatalytic reaction tank 10 having such a configuration, and the water is passed through the flow path 18 formed between the light guide plates 12 arranged in multiple layers. As a result, the tap water flows while alternately repeating the descending flow and the ascending flow, but during this flow, it comes into contact with the photocatalyst coat made of titanium oxide carried on the surface of the light guide plate 12. A Fresnel lens group 20 is arranged on the top plate portion of the reaction tank 10, and sunlight is condensed by the Fresnel lens group 20 and is applied to the photocatalyst through the inner glass of the light guide plate 12. Further, the light of the ultraviolet lamp 22 as an artificial light source is also applied to the photocatalyst carried on the light guide glass. As a result, when tap water flows through the flow path between the pair of light guide plates 12, a photocatalytic reaction due to natural light irradiation and a photocatalytic reaction due to artificial ultraviolet light are simultaneously performed, and harmful substances such as trihalomethane and pesticides contained in tap water are caused. Odor components such as substances and ammonia are oxidatively decomposed and removed.

In the photocatalytic reaction tank 10 of the embodiment, when there is sunlight, it is condensed by the Fresnel lens group 20 and used for the photocatalytic reaction, and at night or in cloudy weather, the photocatalytic reaction by irradiation of only the ultraviolet lamp 22 is performed. Can be done. Therefore, it is possible to remove harmful substances from tap water regardless of whether it is sunshine, night, or cloudy weather. Moreover, since the photocatalyst itself does not need to be mixed as powder in tap water, There is an advantage that the recovery in is unnecessary.

[0012]

[Effect of device]

 As described above, according to the present invention, a light converging Fresnel for arranging a plurality of light guide plates coated with a photocatalyst such as titanium oxide to form a water channel and guiding and irradiating natural light to the light guide plates. Since the lens group and the lamp means for guiding and irradiating artificial light such as ultraviolet rays to the light guide plate are attached, it is possible to use sunlight and artificial light in the same reaction tank at the same time, regardless of the weather. Moreover, it is possible to constantly purify tap water by a photocatalytic reaction even at night, and it is possible to obtain an excellent effect that the work of collecting the catalyst powder is unnecessary.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a photocatalytic reaction tank according to an embodiment.

[Explanation of symbols]

 10 Photocatalytic Reaction Tank 12 Light Guide Plate 14 Upper Header 16 Lower Header 18 Flow Path 20 Fresnel Lens Group 22 UV Lamp 24 Reflector 26 Partition Wall

Claims (1)

[Scope of utility model registration request] 1. A light-collecting Fresnel lens group for arranging a plurality of light guide plates coated with a photocatalyst such as titanium oxide to form a flow path of water between the light guide plates and for guiding and irradiating the light guide plates with natural light. A photocatalytic reaction tank, wherein lamp means for guiding and irradiating artificial light such as ultraviolet rays is optically connected to and attached to the light guide plate.