• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Photocatalytic purification system comprising a conduit (10) with a transparent or translucent part (14), a fluid inlet (11) and a fluid outlet (12) a plurality of separate porous slats (20), made or covered with a photocatalytic material, contained in the illuminated interior area of the duct (10), each porous slat (20) including a first side (20a), directly exposed to incident light (1), which includes first openings (21) with a first cross-sectional area, and a second side (20b), opposite the first side (20a), including second openings (22), each second opening (22) having a second cross-sectional area; wherein the second cross-sectional area is smaller than the first cross-sectional area and wherein the first openings (21) are communicated with the second openings (22) through branched passage channels of tapered section (23), determining a deep penetration of the incident light in the porous slat (20) from the first side (20a) to the second (20b). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2849475A1
    申请号:ES202030141
    申请日:2020-02-18
    公开日:2021-08-18
    发明作者:March Cristina Pardal；Ansuategui Ignacio Paricio；Urquidez Pavel Aguilar；Besora Judit Lopez；Lazo Jaime Flores；Mayoral Oriol Roig
    申请人:Universitat Politecnica de Catalunya UPC；
    IPC主号:
    专利说明:

    [0004] Technique field
    [0006] The present invention is directed to a photocatalytic scrubbing system. A photocatalytic purification system is a system designed to produce purification, in this case of a fluid, preferably a gas such as ambient air, through a photocatalytic process.
    [0008] A photocatalytic process is a chemical photo-reaction between a photocatalytic material and an incident light that produces photocatalytic activity. When said photocatalytic material comes into contact with the fluid to be purified and simultaneously receives incident light, the photocatalytic activity generated modifies the chemical composition of said fluid, reducing or eliminating unwanted chemical compounds from said fluid, causing its purification.
    [0010] State of the art
    [0012] Document EP0993859A1 describes a photocatalytic purification system comprising a conduit with a transparent wall that determines an illuminated interior area, a fluid inlet and a fluid outlet, and a plurality of porous louvers contained within said conduit blocking the flow channel. of fluid defined between the fluid inlet and the fluid outlet, urging the fluid flow to pass through the porous louvers. Said porous slats are made of a photocatalytic material and receive incident light from an external light source towards the transparent walls of the duct, producing a photocatalytic activity that purifies the fluid.
    [0014] But in this document, the porous slats do not implement any improvement to increase the surface of the photocatalytic material that receives incident light or to increase the contact surface between said photocatalytic material that receives incident light and the fluid to be purified.
    [0015] Document JP2000303756A describes a duct comprised between two parallel windows where an obturator is contained, said obturator including numerous nonporous slats coated with a photocatalytic material. A fluid impeller moves ambient air through the duct, surrounding the non-porous louvers. According to this solution, the air flow passes through the slats and windows, and only occasionally comes into contact with the photocatalytic material coating of the slats, due to the turbulence generated in the flow producing the air to be introduced into the intermediate spaces between the parallel slats , leading to very poor scrubbing efficiency.
    [0017] These and other problems are addressed by the proposed invention described below.
    [0019] Brief description of the invention
    [0021] The present invention is directed, according to a first aspect, to a photocatalytic purification system for purifying a fluid, preferably a gas such as ambient air.
    [0023] The proposed photocatalytic purification system comprises, in a manner already known in the state of the art, the following components:
    [0025] • to a conduit that comprises a perimeter wall that includes at least one transparent or translucent part, that is transparent or translucent to an incident light and that determines an illuminated interior area of the conduit, a fluid inlet and a fluid outlet separated from each other determining a fluid flow channel between them;
    [0027] • a plurality of separate porous slats made of, or coated with, a photocatalytic material contained in said inner illuminated area of the duct, each porous slat being transverse to the fluid flow channel covering a complete cross section of the duct such that a flow of the fluid that circulates through the fluid flow channel is forced to pass through said porous slats, where each porous slat has a first side that includes first openings, which have a first cross-sectional area, directly exposed to incident light from the illuminated interior area and a second side, including the second apertures, opposite the first side defining a shaded side, each second aperture having a second cross-sectional area.
    [0029] Accordingly, the fluid flow channel is defined within the conduit, between a fluid inlet and a fluid outlet defined in said conduit, typically at ends. opposite of it. The fluid flow channel will be understood to be the path followed by the fluid passing through the conduit.
    [0031] The perimeter wall of the conduit, which surrounds said fluid flow channel, includes at least one transparent or translucent part so that light incident on said perimeter wall from outside the conduit passes through said transparent or translucent parts of the wall that enter the duct and the illuminating areas inside the duct, determining an interior illuminated area, which is the area inside the duct reached by the incident light passing through said transparent or translucent part of the wall. Typically, said interior illuminated area is comprised of at least a portion of the conduit whose wall comprises said transparent or translucent portion.
    [0033] A plurality of separate porous louvers are contained within said lighted interior area, within the duct, such that each porous louver has a first side exposed to incident light from the lighted interior area and a second side opposite the first side and therefore a shaded side that receives no light when incident light enters from a single light source, such as sunlight.
    [0035] Porous louvers are porous to the fluid circulating within the fluid flow channel, and each porous louver covers the entire cross section of the duct, blocking the fluid flow channel and forcing the fluid through the pores of the duct. porous slats. Preferably, each porous slat is in contact with the perimeter wall through an elastic sealing strip between the porous slats and the perimeter wall.
    [0037] The present invention further proposes, in a manner not known in the state of the art, that:
    [0039] • the second cross-sectional area is smaller than the first cross-sectional area; So what
    [0041] • the first openings communicate with the second openings through branched passage channels of tapered section, determining a deep penetration of incident light into the porous slat from the first side to the second side.
    [0043] Accordingly, the first openings, located on the first side of the porous slats exposed to incident light, are larger than the second openings, because their cross-sectional area is greater than the cross-sectional area of the second openings.
    [0045] It will be understood that the cross-sectional area is the hollow area of the opening measured in a plane transverse to the opening in a region coincident, or adjacent, to the first or second face of the porous slat where said opening is defined, said plane having a selected slope to define the smallest cross-sectional area of the opening at that point.
    [0047] The tapered branched through channels are channels that connect the first openings to the second openings. The channel connected to each first opening branches into several channels, each connected to a different second opening, such that multiple second openings are connected to each first opening. Said channels not only branch, but also narrow from the first openings to the second openings, producing conical channels whose cross-sectional area is gradually reduced.
    [0049] The purification carried out in the fluid by the photocatalytic material depends on the contact surface between the fluid and the photocatalytic material and on the amount of light incident on said photocatalytic material. A larger contact surface and a greater amount of incident light lead to better purification.
    [0051] To purify a given flow or fluid, if said flow or fluid is divided and led through multiple openings and channels, the smaller the openings and channels, the larger the contact surface. But the interior surfaces of these channels only generate photocatalytic activity and fluid purification if they are exposed to incident light, and the narrow channels prevent light from penetrating them.
    [0053] The proposed solution provides a porous slat that simultaneously offers maximum illuminated contact surfaces between the fluid and the photocatalytic material. The solution consists of second openings of an optimized size to maximize the contact surface of the fluid with the porous slat. Said second openings are connected with branched passage channels of tapered section whose inner surfaces are illuminated and, therefore, produce photocatalytic activity. Said tapered passage channels of tapered section are illuminated by the incident light that penetrates from the first openings whose size is optimized to maximize the penetration of the light in said branched passage channels of tapered section. Due to the narrowing of the branched passage channels, the incident light that has penetrated them through the first openings can penetrate more deeply compared to an alternative solution where the branched passage channels of decreasing section have a constant or non-decreasing section area, producing better illumination of the internal surfaces of said narrow branched passage channels and better purification.
    [0055] As a result, the fluid is purified not only when it is in contact with the external surfaces of the porous slats, but also when said fluid passes through the branched passage channels of tapered section of the porous slat, which receives incident light thanks to the proposed solution, greatly increasing the surface of the porous slat that produces photocatalytic activity.
    [0057] According to a preferred embodiment of the present invention, each porous slat has a lower density on the first side than on the second side. Having a lower density on the first side means that the accumulated hollow area on the first side, resulting from the sum of the first cross-sectional areas of all the first openings, is greater than the accumulated hollow area on the second side, such as a result of the sum of the cross-sectional area of the entire second aperture and thus leads to a better penetration of incident light from the first side to the second side.
    [0059] Preferably, the first cross-sectional area is at least twenty times larger than the second cross-sectional area. It is considered that with this dimensional relationship the penetration of light is sufficient.
    [0061] In a preferred embodiment, the second cross-sectional area is equal to or less than 1mm2. This size produces a large contact surface between the fluid and the branched, tapered passageways connected to the second opening having said second cross-sectional area.
    [0063] Additionally, or alternatively, the first cross-sectional area is equal to or greater than 20mm2, allowing deep penetration of the incident light.
    [0065] The thickness of the porous slat can be limited to a size equal to or less than 50mm. A porous slat having a thickness within this range will have light penetration optimal within branched passage channels of tapered section, especially when the first openings are equal to or greater than 20mm2.
    [0067] The tapering branched passageways may further comprise dead-end branching cavities. These dead-end cavities can collect water, for example condensation water or added water. The evaporation of this water can produce a cooling effect on the fluid that passes through the porous louver.
    [0069] Each porous slat can be a three-dimensional openwork mesh with interconnected passage channels or, preferably, each porous slat is made up of multiple superimposed layers of openwork meshes, each layer includes openings that at least partially coincide with openings of adjacent layers that define said channels of branched pitch of tapered section. The cross-sectional area of the openings of the successive overlapping layers gradually increases from the second cross-sectional area to the first cross-sectional area.
    [0071] Preferably the porous slats are made of a ceramic material made of hardened paste or powder, which can be obtained by a 3D printing process, for example by printing overlapping layers with different geometry.
    [0073] The inner surface of the tapered branched passage channels has a surface roughness value equal to greater than the surface roughness value of a three-dimensional printed surface that has been printed with a resolution equal to or greater than 0.3mm. Said resolution of the three-dimensional printed surface is the minimum thickness of each superimposed layer of material deposited during the printing process, which generates a surface roughness on the surface of the 3D printed object, typically small parallel grooves with a separation equal to the resolution of the 3D printer.
    [0075] The surface roughness of the internal surface of the branched passage channels of decreasing section increases the contact surface between the fluid to be purified and the photocatalytic material, and also generates cracks where the particles suspended in the fluid to be purified tend to settle and accumulate, producing not only a chemical purification of the fluid by photocatalytic activity, but also a mechanical purification produced by said deposition of suspended particles.
    [0076] Preferably, the internal surface of the passage channels has a roughness value greater than 5 pm, preferably greater than 10 pm, and preferably between 10 pm and 50 pm. This roughness is selected to maximize the retention of particles equal to or greater than 2.5 pm.
    [0078] The transparent or translucent portion of the perimeter wall of the incident light transparent or translucent conduit described above may include a flat surface or two opposing flat surfaces facing each other.
    [0080] When the conduit includes a flat transparent or translucent surface, said flat surface should face the external light source, eg sunlight, to allow illumination of the illuminated interior area of the conduit.
    [0082] When the duct includes two flat transparent or translucent surfaces facing each other, one of said flat surfaces should face the external light source, for example sunlight, to allow illumination of the illuminated interior surface of the duct, and the light of the illuminated interior area can exit the conduit through the opposite flat surface, allowing the illumination of a space or a housing located behind said conduit.
    [0084] For example, the duct can be defined between two parallel windows on the facade of a building, allowing natural light to enter the building through it. In this example, the fluid inlet may be at the bottom of the duct, directed toward the outside of the building to absorb ambient air outside the building, and the fluid outlet may be at the top of the duct, directed inward. of the building to introduce purified ambient air into the building. Optionally, said outlet can be connected to an air conduction system of the building to conduct said purified air to different areas of the building or to perform additional treatments on said purified air before releasing it to the interior of the building.
    [0086] At least a transparent or translucent part of the perimeter wall of the conduit is pivotally attached to the rest of the conduit, defining a hatch movable between a closed position and an open position and including a locking device to retain the surface in the closed position. . Said hatch can be opened to allow cleaning of the inside of the duct.
    [0087] The porous slats can be removably attached to the duct and can also be removable through the hatch, for replacement or for deep cleaning operations.
    [0089] When the duct is vertical, with its inlet at the lower end and its outlet at the upper end, the incident light generates a greenhouse effect inside the duct, heating the fluid contained in it and generating a natural rise of said fluid from the lower end. to the upper end of the conduit, generating a fluid flow along the fluid flow channel. Notwithstanding the foregoing, to control or accelerate this movement of the fluid, or when the conduit is in a different position, the fluid flow channel may include a fluid impeller connected thereto. Such a fluid impeller, for example a fan or a pump, will force the movement of the fluid in the desired direction and with the desired flow through the conduit.
    [0091] The fluid flows from the fluid inlet to the fluid outlet of the conduit passing through each porous slat from the second side to the first side.
    [0093] It will also be understood that any given range of values may not be optimal at extreme values and may require adaptations of the invention to these applicable extreme values, such adaptations are within the reach of a skilled person.
    [0095] Other features of the invention appear from the following detailed description of an embodiment.
    [0097] Brief description of the figures
    [0099] The above and other advantages and characteristics will be more fully understood from the following detailed description of an embodiment with reference to the accompanying drawings, which will be taken in an illustrative and non-limiting manner, in which:
    [0101] Fig. 1 shows a vertical section of the photocatalytic scrubbing system according to an embodiment in which the conduit includes two opposing flat surfaces that are opposite each other, transparent or translucent to an incident light, wherein the incident light is shown as thick arrows where the flow of ambient air passing through the fluid flow channel is shown as a thin arrow;
    [0103] Fig. 2A shows a cross section of a porous slat made through a section line indicated in Fig.2B, according to a first embodiment;
    [0104] Fig. 2B shows a plan view of the first side of the porous slat shown in Fig. 2A;
    [0106] Fig. 3A shows a cross section of a porous slat made through a section line indicated in Fig.3B, according to a second embodiment;
    [0108] Fig. 3B shows a plan view of the first side of the porous slat shown in Fig. 3A;
    [0110] Fig. 4A shows a cross section of a porous slat made through a section line indicated in Fig. 4B, according to a third embodiment;
    [0112] Fig. 4B shows a plan view of the first side of the porous slat shown in Fig. 4A;
    [0114] Fig. 5A shows a cross section of a porous slat made through a section line indicated in Fig. 5B, according to a fourth embodiment;
    [0116] Fig. 5B shows a plan view of the first side of the porous slat shown in Fig. 5A.
    [0118] Detailed description of an embodiment
    [0120] The above and other advantages and characteristics will be more fully understood from the following detailed description of an embodiment with reference to the accompanying drawings, which will be taken in an illustrative and non-limiting manner.
    [0122] According to a preferred embodiment of the present invention shown in Fig. 1, the photocatalytic purification system includes a rectangular duct 10 defined by four flat surfaces constituting a perimeter wall 13. Said perimeter wall 13 includes a transparent or translucent part 14 , transparent or translucent to the incident light 1 that penetrates inside the conduit 10 through said transparent or translucent part 14. The internal volume of the conduit 10 that receives the incident light 1 through said transparent or translucent part 14 of the perimeter wall 13 is called the illuminated interior area. Typically incident light 1 is sunlight.
    [0124] Two of said flat surfaces have a larger surface area than the other two surfaces. At least one of said flat surfaces with greater surface area, and preferably both are made of a material transparent or translucent to visible light. In the preferred embodiment, said transparent or translucent portions 14 of conduit 10 are defined by a glass window that is optionally pivotally attached to the rest of the perimeter wall 13 and that preferably includes a locking device to retain said glass window in the closed position.
    [0126] According to this embodiment, the duct 10 is defined in the interspace between two parallel glass windows, for example vertical glass windows on the facade of a building.
    [0128] Conduit 10 includes a fluid inlet 11 and a fluid outlet 12 at its opposite ends, defining a fluid flow channel 2 therebetween along conduit 10.
    [0129] In the case shown in Fig. 1, the fluid inlet 11 is at the lower end of the conduit 10 and the fluid outlet is positioned at the upper end of the conduit 10. The fluid inlet 11 takes ambient air from one side of the duct 10, in this case from the same side of the duct 10 exposed to the incident light 1, and the fluid outlet 12 expels the ambient air, once it has been treated in the photocatalytic purification system, to the side of the duct 10 not exposed to incident light 1. When said duct 10 is integrated into the facade of a building, the fluid inlet 11 takes air from outside the building and the fluid outlet 12 introduces said air once it has been cleaned in the building .
    [0131] Optionally, the fluid inlet 11, the fluid outlet 12, or both can be connected to a fluid line and / or a fluid impeller 3 to control the flow of the fluid through the photocatalytic scrubbing system.
    [0133] The duct 10 includes, within the illuminated interior area, a plurality of parallel porous slats 20 spaced apart, each porous slat being transverse to duct 10 and occupying the entire sectional area of said duct 10, the entire perimeter of each porous slat 20 being in contact with the perimeter wall 13 of the duct 10, each porous slat 20 completely interrupts the fluid flow channel 2, so that the fluid flow can only circulate along the duct 10 passing through the porous slats twenty.
    [0135] Each porous slat 20 is made of or coated with a photocatalytic material that produces photocatalytic activity when it receives incident light 1. Each porous slat 20 has two opposite sides, a first side 20a exposed to incident light 1 from the illuminated interior area, and a second side 20b opposite the first side 20a.
    [0137] The first side 20a includes first openings 21, each of a first cross-sectional area, and the second side includes second openings 22, each of a second cross-sectional area smaller than the first cross-sectional area.
    [0139] The porous slat 20 also includes tapered tapered passage channels 23 that communicate the first openings 21 with the second openings 22 with tapered tapered channels, allowing the passage of a fluid through said tapered tapered passage channels 23 through of the porous slat 20.
    [0141] Preferably, each tapered branched passage channel 23 communicates a first opening 21 with multiple second openings 2, and preferably the second openings 22 are more numerous, eg more than 10 times as numerous, than the first openings 21.
    [0143] Because the first openings 21 have a larger cross-sectional area than the second openings 22, the internal conical surfaces of the tapered, branched passage channels 23 have improved exposure to incident light 1 striking the first surface 20a. and penetrates the tapered branched passage channels 23 through said first openings 21.
    [0145] Because said tapered branched passage channels 23 are narrowing, their cross section narrows as it approaches the second side 20b of the porous slat 20, producing funnel-shaped internal surfaces of the branched passage channels of tapered section 23 that can easily intercept incident light 1 penetrating into branched tapered passage channels 23.
    [0147] Because said tapering branched passageways 23 branch, each first opening 21 is connected to multiple smaller second openings 22, so that the fluid passing through a first opening 21 is the same amount of fluid. that passes not through a single one, but through multiple second openings 22. This characteristic makes it possible to increase the internal surface of the branched passage channels of tapered section 23, increasing the surface exposed to incident light and increasing the contact surface between the fluid and photocatalytic material, but does not produce a significant reduction in the added cross-sectional area through which fluid passes, because the flow of fluid passing through a first opening 21 is the same as the flow of fluid passing through multiple second openings 22.
    [0149] This combination of channels that are narrowing and at the same time branching allows an improved penetration of the incident light 1 therein and increases the contact surface between the fluid and the photocatalytic material.
    [0151] Preferably, the aggregate cross-sectional area of all first openings 21 of a porous slat 20 is less than three times the aggregate cross-sectional area of all second openings of the same porous slat 20.
    [0153] Figs. 2A to 5B show different possible embodiments of the porous slat 20.
    [0155] According to the first embodiment of the porous slats 20, shown in Figs. 2A and 2B, each porous slat 20 comprises multiple overlapping layers, each layer with a different number of openings. The top layer includes the first openings 21 arranged in a regular matrix. The lower layer includes the second openings 22, smaller than the first opening 21 and includes multiple second openings 22 in the footprint of each first opening 21. One or more intermediate layers may be sandwiched between said upper and lower layers, each intermediate layer including , in the footprint of each first opening 21, more openings than the immediately upper layer, but of a smaller size, each of said openings contains in its footprint multiple openings of the immediately lower layer. Said interconnected openings determine the branched, tapered passage channels 23.
    [0157] In this example, the first openings, the second openings, and the intermediate openings are square openings arranged in rows and columns.
    [0159] The intermediate layer placed immediately below the upper layer comprises four intermediate openings in the footprint of each first opening 21, which divides said first opening 21 in four by two crossed walls. The lower layer comprises four second openings 22 in the tread of each intermediate opening, and therefore sixteen second openings 22 in the tread of each first opening 21.
    [0160] Other embodiments are also contemplated that include multiple intermediate layers, eg, first, second, third ... intermediate layers, each with an increasing number of first, second, third ... intermediate openings relative to the preceding layer.
    [0161] According to a second embodiment of the porous slat 20, shown in Figs. 3A and 3B, comprises a lower layer that includes a plurality of second discrete openings 22 and an upper layer that includes a continuous zigzag wall of material that determines the open interspaces that constitute the first openings 21, and that coincide with the second openings. 22, each first opening 21 containing multiple second openings 22. Between said lower and upper layers, one or multiple intermediate layers may be included, each intermediate layer including multiple openings in the footprint of the upper layer and containing multiple second openings in the footprint. of each intermediate layer. Said interconnected openings determine the branched, tapered passage channels 23.
    [0163] According to a third embodiment, shown in Figs. 4A and 4B, the porous slat 20 is constituted by layers of parallel strips superimposed in orthogonal directions, the strips have an increasing separation and / or a decreasing thickness from the lower layer towards the upper layer, so that the intermediate spaces between said strips constitute said branched passage channels of tapered section 23.
    [0165] In this third embodiment, each first opening 21 is defined by the hollow space defined between four adjacent orthogonal strips of the two upper layers of the porous slat 20. Two strips of the upper layer and two strips of the layer immediately below the upper layer which are perpendicular to the two strips mentioned above. Similarly, each second opening 22 is defined by the hollow space defined between four adjacent orthogonal strips of the two lower layers of porous slat 20.
    [0167] According to a fourth embodiment, shown in Figs. 5A and 5B, each first opening 21 is surrounded by a perimeter wall of a certain height. Each first opening 21 contains one or more concentric walls of decreasing height that are concentric to the perimeter wall. The concentric walls are connected to the perimeter wall through ribs. The interspaces defined between the perimeter wall, the concentric walls, and the ribs define the tapered, branched passage channels 23 that connect each first opening 23 with multiple second openings 22.
    [0168] In this example, the perimeter wall and concentric walls are square tubes, but other shapes are also contemplated, such as triangular tubes or hexagonal tubes.
    [0170] The perimeter wall of this fourth embodiment further comprises dead-end branching cavities 24 where water or condensed water can be stored and evaporated during catalytic activity to reduce the temperature of the fluid. This feature can be added to any of the other described embodiments of the porous slat 20.
    [0172] The porous slats 20 shown in the first, second, third and fourth embodiments are preferably produced by a 3D printing method, for example, by deposition of strips or layers or hardening of layers or strips. Preferably, the 3D printing is produced by a printer that has a resolution equal to or greater than 0.3mm, preferably between 0.3mm and 1mm, to produce a surface roughness optimized to retain suspended particles in the fluid to be purified.
    [0174] In a preferred embodiment, the tapered branched passage channels 23 are not aligned with the fluid flow channel 2 but with a direction that intersects the transparent or translucent portion 14 of the perimeter wall 13 of the conduit 10, so that an incident light 1 passing through said transparent or translucent part 14 is more likely to penetrate deeply into the branched passage channels of tapered section 23.
    [0176] The direction of each tapered branched passage channel 23 is determined by the average direction of the imaginary lines connecting the center of a first opening 21 with the center of all second apertures 22 mainly connected thereto through the same passage channel. branched tapered section 23.
    [0178] Preferably, said direction of the tapered branched passage channels 23 intersects with the transparent or translucent part 14 of the perimeter wall 13 of the conduit 10 at an angle greater than 30 °, preferably between 60 ° and 30 °.
    [0180] It will be understood that various parts of one embodiment of the invention may be freely combined with parts described in other embodiments, even if said combination is not explicitly described, as long as there is no harm in said combination.
    权利要求:
    Claims (15)
    [1]
    1. A photocatalytic purification system comprising:
    • a duct (10) comprising a perimeter wall (13) that includes at least one transparent or translucent part (14), which is transparent or translucent to an incident light (1) and which determines an illuminated interior area of the duct (10 ), a fluid inlet (11) and a fluid outlet (12) separated from each other to determine a fluid flow channel (2) between them;
    • a plurality of separate porous slats (20) made of, or coated with, a photocatalytic material contained in said inner illuminated area of the conduit (10), each porous slat (20) is transverse to the fluid flow channel (2) and covers a complete cross section of the conduit (10) so that the flow of a fluid that circulates through the fluid flow channel (2) is forced to pass through said porous slats (20), in which each Porous slat (20) has a first side (20a), which includes first openings (21) with a first cross-sectional area, directly exposed to the incident light (1) of the illuminated interior area and a second side (20b), including second openings (22), opposite the first side and defining a shaded side, each second opening (22) having a second cross-sectional area;
    characterized because
    • the second cross-sectional area is smaller than the first cross-sectional area; and
    • the first openings (21) communicate with the second openings (22) through branched passage channels of tapered section (23), determining a deep penetration of incident light into the porous slat (20) from the first side (20a ) to the second side (20b) .2
    [2]
    Photocatalytic purification system according to any of the preceding claims, in which each porous slat (20) has a lower density on the first side (20a) than on the second side (20b).
    [3]
    3. Photocatalytic purification system according to claim 1 or 2, wherein
    • the first cross-sectional area is at least twenty times larger than the second cross-sectional area; or
    • The second cross-sectional area is equal to or less than 1mm2 and / or the first cross-sectional area is equal to or greater than 20mm2 and / or the thickness of the porous slat (20) is equal to or less than 50mm.
    [4]
    Photocatalytic purification system according to any one of the preceding claims, in which the branched, tapered passage channels (23) further comprise dead-end branching cavities (24).
    [5]
    5. Photocatalytic purification system according to claim 1, in which each porous slat (20) is a three-dimensional openwork mesh with interconnected passage channels.
    [6]
    6. Photocatalytic purification system according to claim 1, in which each porous slat (20) is made up of multiple superimposed layers of openwork meshes, each layer including openings at least partially coincident with openings in adjacent layers that define said branched passage channels tapered section (23), and wherein the cross-sectional area of the openings of the successive superimposed layers gradually increases from the second cross-sectional area to the first cross-sectional area.
    [7]
    Photocatalytic purification system according to any of the preceding claims, in which the porous slats (20) are made of ceramic material made of a hardened paste or powder.
    [8]
    Photocatalytic scrubbing system according to any one of the preceding claims, wherein an internal surface of the tapered branched passage channels (23) has a surface roughness value equal to greater than the surface roughness value of a printed surface using three-dimensional printing techniques printed with a resolution equal to or greater than 0.3mm.
    [9]
    Photocatalytic scrubbing system according to any one of the preceding claims, in which an internal surface of the branched, tapered passage channels (23) has a roughness value greater than 10 pm.
    [10]
    Photocatalytic purification system according to any of the preceding claims, wherein said transparent or translucent part (14) of the perimeter wall of the conduit (10) includes a flat surface or two opposite flat surfaces facing each other.
    [11]
    Photocatalytic purification system according to any of the preceding claims, wherein said at least one transparent or translucent part (14) of the perimeter wall (13) of the conduit (10) is pivotally attached to the rest of the conduit (10 ), defining a hatch movable between a closed position and an open position and including a locking device to retain it in the closed position.
    [12]
    Photocatalytic purification system according to claim 11, in which the porous slats (20) are removably attached to the conduit (10) and removable through the hatch.
    [13]
    Photocatalytic scrubbing system according to any of the preceding claims, wherein the fluid flow channel (2) comprises a fluid impeller (3) connected thereto.
    [14]
    Photocatalytic purification system according to any of the preceding claims, in which the fluid circulates from the fluid inlet (11) to the fluid outlet (12) of the conduit (10) passing through each porous slat (20) from the second side (20b) to the first side (20a).
    [15]
    Photocatalytic scrubbing system according to any of the preceding claims, in which the branched passage channels of tapered section (23) are aligned with a direction that intersects with the transparent or translucent part (14) of the perimeter wall (13 ) of the duct (10).
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    同族专利:
    公开号 | 公开日
    ES2849475B2|2022-02-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20070245702A1|2006-04-25|2007-10-25|Sharp Kabushiki Kaisha|Honeycomb structure and manufacturing method thereof, and air cleaner and water purifier containing the honeycomb structure|
    EP2409954A1|2010-07-20|2012-01-25|National Center for Scientific Research Demokritos|Photocatalytic purification device|
    WO2017211215A1|2016-06-07|2017-12-14|杨国勇|Fluid processing device and preparation method therefor|
    WO2019064264A1|2017-09-29|2019-04-04|Inpigest S.R.L.|Photocatalytic sanitizing reactor|
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