JP3176064U - Organic compound decomposition equipment - Google Patents

Abstract

An object of the present invention is to provide an organic compound decomposing apparatus that effectively removes organic compound components in exhaust gas and is easy to maintain.
An organic compound decomposing apparatus 10 according to the present invention includes an organic compound-containing gas inlet 22, an outlet 24, and a flow path 26 of the organic compound-containing gas between the inlet 22 and the outlet 24. A turbulent flow generating means 30 for generating a turbulent flow of the organic compound-containing gas in the flow path 26, and the organic being in a turbulent flow state in the flow path 26 And ultraviolet irradiation means 40 for decomposing the organic compound component by irradiating the compound-containing gas with ultraviolet rays.
[Selection] Figure 1

Description

  The present invention particularly relates to an organic compound decomposing apparatus that is attached to an exhaust path containing an organic compound component and decomposes the organic compound component in the exhaust gas.

  Food processing, restaurant kitchens, home ventilation ducts, etc. contain oil components in the exhaust. In particular, oil smoke with a large amount of oil components in the exhaust can cause poor hygiene and ignition if it adheres to and solidifies in the duct that forms the distribution route of the exhaust.Therefore, maintenance work is required to periodically remove the solidified oil components. Become. Further, in the exhaust of the kitchen, an organic product obtained by the reaction of the oil component, protein, and lipid is dissolved in the vaporized in high temperature and high humidity. When this exhaust component adheres to the filter, it also adsorbs bacteria mixed in with dust and the like floating in the air, so that the bacteria grow and become unsanitary. In addition, the oil component that has been carbonized and adsorbed may drip and react with the flame being cooked to cause a fire.

Examples of conventional means for removing oil components in exhaust gas include the techniques disclosed in Patent Documents 1 and 2.
The ventilator disclosed in Patent Document 1 has an exhaust pipe formed above the heating means, and a filter box is provided in the middle of the exhaust pipe. The filter box includes a separator that attaches bacteria and oil-water components, and a light source that disinfects the bacteria to decompose and evaporate the oil-water components.

  The range hood disclosed in Patent Document 2 is such that the photocatalytic surface of the filter is positioned on the entire surface of the range hood when collecting oil smoke, and the photocatalytic surface of the filter is opposed to the ultraviolet light source in the range hood when the attached oil is decomposed. , Oil collection efficiency and adhesion oil decomposition efficiency are increased.

JP 2006-329477 A Japanese Patent Laid-Open No. 10-185265

However, the separator of patent document 1 bears the role which isolate | separates the gas component and oil-water component which are contained in haze, and the oil-and-fat component which adhered will solidify. In this case, it is necessary to periodically replace the separator from the filter box.
Further, according to Patent Document 2, since floating oil is attached to the photocatalyst layer coating layer when oil smoke passes through the gap between the photocatalyst coating metal plates, maintenance for oxidizing and decomposing the oil content of the metal plate by ultraviolet irradiation is performed. Necessary. The link is rotated to irradiate the contaminated filter with ultraviolet light. For this reason, there has been a problem that the apparatus becomes complicated.

  Accordingly, in order to solve the above-mentioned problems of the prior art, an object of the present invention is to provide an organic compound decomposing apparatus that effectively removes organic compound components in exhaust gas and that can be easily maintained. .

  The organic compound decomposing apparatus of the present invention includes an organic compound-containing gas inlet, an outlet, a casing having a flow path for the organic compound-containing gas between the inlet and the outlet, and the inlet. And turbulent flow generating means for generating turbulent flow of the organic compound-containing gas in the flow path, and decomposing the organic compound components by irradiating the organic compound-containing gas that is in a turbulent flow state in the flow path with ultraviolet rays. And an ultraviolet irradiation means.

  With such a configuration, the organic compound-containing gas in a turbulent state can be irradiated with ultraviolet rays through the flow path in the casing, and the organic compound component in the organic compound-containing gas can be effectively removed. In addition, the maintenance of the apparatus can be greatly reduced.

The turbulent flow generating means includes a plurality of substantially U-shaped plates having recesses and a pair of holders that support both ends of the plates in the longitudinal direction, and the plates face upwards of the recesses The organic compound-containing gas passes between the bottom and the bottom of the open portion that is opposed to the bottom and the bottom of the open portion that is opposed to the bottom of the open portion. It is characterized in that it is attached to the holder with a gap.
With such a configuration, the organic compound-containing gas introduced into the casing can be efficiently turbulent.

The turbulent flow generating means is attached so as to cover the inflow port, and is arranged so as to intersect with a horizontal plane so that any one of the holders is at the lowest position.
With such a configuration, the water generated by the decomposition of the organic compound component by the ultraviolet irradiation adheres to the plate and travels downward, and can be poured into the lowermost holder. Therefore, maintenance can be easily performed.

The holder includes a frame portion in which the opening portion of the concave portion is alternately and continuously arranged upward and downward to fit the end portion in the longitudinal direction of the plate, and between the bottom surface of the frame portion of the holder and both ends in the longitudinal direction of the plate It is characterized by providing a gap.
With such a configuration, the water flowing into the holder can be easily collected and discharged to the outside. Therefore, maintenance can be easily performed.

The turbulent flow generating means is a cylindrical body that is formed in a spiral shape that covers the outer periphery along the longitudinal direction of the ultraviolet irradiation means with the ultraviolet irradiation means as the center.
With such a configuration, the turbulent state of the organic compound-containing gas can be generated in a space-saving manner, and the entire apparatus can be reduced in size. Moreover, ultraviolet rays can be efficiently irradiated against turbulent flow, and the decomposition removal rate of organic compound components can be increased.

The ultraviolet irradiation means has an irradiation wavelength of 254 nm and / or an irradiation wavelength of 184 nm as a main wavelength.
With an irradiation wavelength of 254 nm, a photodecomposition reaction in which a long chain molecular structure is decomposed into a short chain molecular structure to generate a free radical can be performed. In addition, ozone generated at an irradiation wavelength of 184 nm can generate a carbon dioxide (CO ₂ ) and water (H ₂ O) by performing a photo-oxidation reaction on the organic compound in the exhaust gas.

  According to the organic compound decomposition apparatus of the present invention having the above-described configuration, the organic compound component in the organic compound-containing gas can be effectively removed. In addition, the maintenance of the apparatus can be greatly reduced.

It is explanatory drawing of the outline of a structure of the organic compound decomposition | disassembly apparatus of this invention. It is the schematic which saw through the organic compound decomposition | disassembly apparatus from the side surface. It is the schematic which saw through the organic compound decomposition | disassembly apparatus from the front. It is a bottom view of a turbulent flow generation means. It is an AA arrow line view of FIG. It is a BB arrow line view of FIG. It is a perspective view of an ultraviolet irradiation means. It is explanatory drawing of the structure outline of the modification of the organic compound decomposition | disassembly apparatus of this invention. It is a graph of the deodorizing effect of toluene using the organic compound decomposition | disassembly apparatus of this invention.

  Embodiments of the organic compound decomposition apparatus of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an explanatory diagram of a schematic configuration of an organic compound decomposition apparatus of the present invention. FIG. 2 is a schematic view of the organic compound decomposition apparatus seen through from the side. FIG. 3 is a schematic view of the organic compound decomposition apparatus seen through from the front.

  The organic compound decomposing apparatus 10 according to the present invention includes an organic compound-containing gas inlet 22, an outlet 24, and a casing 20 having an organic compound-containing gas flow path 26 between the inlet 22 and the outlet 24, Attached to the inflow port 22, turbulent flow generating means 30 for generating a turbulent flow of the organic compound-containing gas in the flow path 26, and irradiating the organic compound-containing gas in a turbulent state in the flow path 26 with ultraviolet rays Thus, the ultraviolet light irradiation means 40 for decomposing the organic compound component is the main basic configuration.

  The casing 20 includes an organic compound-containing gas inflow port 22, an outflow port 24, and a space serving as a flow path 26 for the organic compound-containing gas between the inflow port 22 and the outflow port 24. The inflow port 22 is formed on the lower surface of the casing 20. The inflow port 22 may be disposed at an opposing position so that organic compound-containing gas, for example, oil smoke rising from a source of oil smoke such as a cooking table, and organic compounds such as toluene and benzene can be sucked. it can. The outflow port 24 is formed on the upper surface of the casing 20 and has an opening diameter smaller than that of the inflow port 22. The outlet 24 is formed so as to be connectable to a duct 28 that circulates inside the casing 20 and discharges air from which organic compound components have been removed to the outside. The main body of the casing 20 is a space serving as a flow path 26 for the organic compound-containing gas, and the organic compound-containing gas does not leak and diffuse from outside the inlet 22 and the outlet 24 of the organic compound-containing gas to the outside.

FIG. 4 is a bottom view of the turbulent flow generating means. FIG. 5 is an AA arrow view of FIG. 6 is a view taken in the direction of arrows BB in FIG. The turbulent flow generation means 30 has a main body composed of a plurality of plates 32 and a pair of holders 34 as a main basic configuration.
The plate 32 is a substantially U-shaped plate member in a cross-sectional view and a substantially rectangular plate member in a plan view. As shown in the drawing, the plate 32 of the present embodiment is formed in a trumpet shape in which the side wall 32c is expanded in a direction away from the bottom surface 32d in a sectional view. The plate 32 only needs to have heat resistance and predetermined rigidity, and a metal plate such as stainless steel, steel, or aluminum can be used as an example of the material. In the plate 32 of the present embodiment, a configuration including a bottom surface 32d and a side wall 32c is referred to as a recess 32a, and an inner region of the recess 32a is referred to as an open portion 32b.

  The holder 34 is a substantially U-shaped frame-shaped plate member in cross-sectional view. The holder 34 has a plurality of plates 32 arranged at equal intervals in the lateral direction of the short side, and both ends thereof are fixed in the frame by welding, fastening means or the like. As with the plate 32, the holder 34 only needs to have heat resistance and predetermined rigidity, and a metal plate such as stainless steel, steel, or aluminum can be used as an example of the material. In the holder 34 of the present embodiment, a configuration including a bottom surface 34a and a side wall 34b is hereinafter referred to as a frame portion 34c.

  The turbulent flow generating means 30 of this embodiment continuously arranges 14 plates 32 with gaps A in the lateral direction of the short sides so that the open portions 32b of the concave portions 32a are alternately upward and downward. In addition, a gap B through which the organic compound-containing gas passes is provided between the opening 32b facing the tip of the side wall 32c and the bottom 32d of the opening 32b facing the tip of the side wall 32c. The frame 34 a of the holder 34 is formed. In addition, the holder 34 includes a frame portion 34c in which the end portions in the longitudinal direction of the plate 32 in which the open portions 32b of the concave portion 32a are alternately arranged continuously upward and downward, and the bottom surface 34a of the frame portion 34c of the holder 34 and the plate 32 are accommodated. A gap C is provided between both ends in the longitudinal direction. And the unevenness | corrugation of the front and back of a main body is formed so that it may become the same form. As shown in FIGS. 2 and 3, the turbulent flow generating means 30 having such a configuration is formed between the plates 32 in which the organic compound-containing gas introduced from the inlet 22 is formed on one surface of the turbulent flow generating means 30. If it flows in from the clearance gap, it will collide with the recessed part 32d of the plate 32 which opposes, and an inflow direction will change. Then, it collides with the concave portion 32 d of the inflow side plate 32 to change the inflow direction, and moves to the distribution path 26. Such a change in the inflow direction occurs in the gaps A and B between the plates. Thereby, in the flow path 26, the eddy current of the organic compound-containing gas is generated and becomes a turbulent state.

Since the gap A between adjacent plates 32 (for example, downward and downward) faces the concave portion 32a of the opposing plate 32 (upward), ultraviolet rays generated in the casing 20 are irradiated from the inlet 22 to the outside. It will not be done.
The turbulent flow generation means 30 has a pair of handles 36 attached to either side of the main body along the longitudinal direction of the plate 32.

FIG. 7 is a perspective view of the ultraviolet irradiation means. The ultraviolet irradiation means 40 is multi-staged in a direction (for example, vertical direction) in which a unit in which a plurality of discharge tubes are arranged in parallel is stacked with respect to the flow direction (for example, vertical direction) of the organic compound-containing gas in the flow path 26. It is attached. The ultraviolet irradiation means 40 of this embodiment uses a discharge tube having an irradiation wavelength of 184 nm as a main wavelength and a discharge tube having an irradiation wavelength of 254 nm as a main wavelength. A discharge tube having an irradiation wavelength of 184 nm as a main wavelength mainly generates radical atoms and reacts with oxygen atoms to generate ozone (O ₃ ). The generated ozone undergoes a photo-oxidation reaction on the organic compound in the exhaust gas to generate carbon dioxide (CO ₂ ) and water (H ₂ O). A discharge tube having an irradiation wavelength of 254 nm as a main wavelength can mainly perform photolysis for decomposing a long chain molecular structure into a short chain molecular structure to generate a free radical. The illustrated ultraviolet irradiation means 40 forms an irradiation unit 48 in which two discharge tubes 42 having an irradiation wavelength of 184 nm and two discharge tubes 44 having an irradiation wavelength of 254 nm are alternately arranged in parallel and surrounded by an outer frame 46. The irradiation unit 48 is stacked in two stages on the exhaust gas distribution path. Further, the ultraviolet irradiation means 40 may be configured to use either or both of a discharge tube having an irradiation wavelength of 184 nm and a discharge tube having an irradiation wavelength of 254 nm.

The organic compound decomposing apparatus 10 of the present invention having the above configuration operates as follows.
First, the organic compound-containing gas generated from the organic compound-containing gas generation source is introduced into the casing 20 from the inlet 22 of the casing 20. A turbulent flow generating means 30 is attached in the vicinity of the inflow port 22. When the organic compound-containing gas introduced from the inflow port 22 flows in from the gap between the plates 32 formed on one surface of the turbulent flow generation means 30, it collides with the concave portion 32a of the opposing plate 32 and the inflow direction changes. . Then, it collides with the concave portion 32 a of the plate 32 on the inflow side to further change the inflow direction to form a vortex and move to the flow path 26. Thereby, in the distribution channel 26, the eddy current of the organic compound-containing gas is generated and becomes a turbulent state. Then, the ultraviolet rays generated from the ultraviolet irradiation means 40 are irradiated to the turbulent organic compound-containing gas. A discharge tube having an irradiation wavelength of 184 nm as a main wavelength mainly generates radical atoms and reacts with oxygen atoms to generate ozone (O ₃ ). The generated ozone undergoes a photo-oxidation reaction on the organic compound in the exhaust gas to generate carbon dioxide (CO ₂ ) and water (H ₂ O). A discharge tube having an irradiation wavelength of 254 nm as a main wavelength mainly performs photolysis that decomposes a long chain molecular structure into a short chain molecular structure to generate free radicals. As an example, glucose (C ₆ H ₁₂ O ₆ ) serving as an oil component becomes carbon dioxide and water by a photolysis reaction and an oxidative decomposition reaction. The generated carbon dioxide is discharged together with the exhaust gas to the outside of the casing 20. On the other hand, the generated water adheres to the turbulent flow generation means 30. The turbulent flow generating means 30 is attached so as to cover the inflow port 22 and is arranged so as to intersect the horizontal plane so that either one of the holders 34 is at the lowest position. For this reason, it adheres to the inclined plate, is transmitted downward, and can be poured into the holder at the lowest position. The holder 34 includes a frame portion 34c in which the end portions in the longitudinal direction of the plate 32 in which the open portions 32b of the concave portion 32a are continuously arranged alternately upward and downward are accommodated. The bottom surface 34a of the frame portion 34c of the holder 34 and the plate 32 Since the gap C is provided between both ends in the longitudinal direction, the water flowing into the holder can be easily collected and discharged to the outside. The exhaust gas from which the oil component has been removed flows out of the casing 20 from the outlet 24.

  According to such an organic compound decomposing apparatus of the present invention, it is possible to irradiate ultraviolet light to a turbulent organic compound-containing gas in a flow path in the casing, and to effectively use the organic compound component in the organic compound-containing gas. Can be removed. In addition, it is not configured to irradiate ultraviolet rays after removing the oil component with a filter as in the past, but it effectively generates organic compounds by generating turbulent flow of organic compound-containing gas in the casing and extending the residence time. Can be decomposed by irradiating with UV light. Therefore, the maintenance of the apparatus can be greatly reduced.

  FIG. 8 is an explanatory diagram of a schematic configuration of a modification of the organic compound decomposition apparatus of the present invention. In the organic compound decomposing apparatus according to the modified example, the turbulent flow generating means 30 </ b> A is spirally formed on the outer periphery of the ultraviolet irradiation means 40. As shown in the figure, the turbulent flow generating means 30A is provided with an insertion space into which the ultraviolet irradiation means 40 can be inserted at the center. The two cylindrical bodies 50A and 50B are formed so as to cover the insertion space in a spiral shape along the longitudinal direction. A pair of both ends of the cylindrical body are formed at both ends of the insertion space, and either one becomes the inflow part 52 of the organic compound-containing gas, and either one becomes the discharge part 54. The inflow portion 52 is connected to the inflow port of the casing, and the outflow portion 54 is connected to the outflow port of the casing. The cylinders 50A and 50B may be made of a material that transmits ultraviolet rays from the ultraviolet irradiation means 40 disposed at the center. For example, a quartz glass tube or the like can be used.

  In the organic compound decomposition apparatus according to the modified example having the above-described configuration, the organic compound-containing gas generated from the generation source of the organic compound-containing gas is introduced from the inlet of the casing into the inflow portion 52 of the turbulent flow generation means 30A disposed in the casing. The The organic compound-containing gas that passes through the cylinders 50A and 50B serving as the turbulent flow generating means 30A formed so as to spirally cover the outside of the ultraviolet irradiation means generates a vortex on the outer periphery of the ultraviolet irradiation means inside the casing 20. And become turbulent. The turbulent organic compound-containing gas undergoes photolysis and / or photooxidation reaction by ultraviolet rays irradiated from the ultraviolet irradiation means 40, and is decomposed into carbon dioxide and water. The exhaust gas from which the organic compound component has been removed flows out of the casing 20 from the outlet 24 via the outflow portion 54.

Even in the organic compound decomposing apparatus of such a modification, the organic compound component in the organic compound-containing gas can be effectively removed. In addition, the maintenance of the apparatus can be greatly reduced.
As the organic compound, in addition to the above-described oily smoke, there are organic solvents such as toluene, benzene and hexane, acrylic monomers, resin components such as polyethylene, polypropylene, PVC, vinyl and polycellulose. FIG. 9 is a graph of the deodorizing effect of toluene using the organic compound decomposition apparatus of the present invention. The vertical axis of the graph represents the concentration (ppm) of toluene, and the horizontal axis represents time (hr). Δ is an apparatus using an ultraviolet irradiation means having an irradiation wavelength of 254 nm as a main wavelength and a lithium catalyst. □ is an apparatus using an ultraviolet irradiation means having an irradiation wavelength of 254 nm as a main wavelength, which is the organic compound decomposition apparatus 10 of the present invention. ● is a device using ultraviolet irradiation means that does not decompose organic compounds. A circle indicates a case where no organic compound decomposition apparatus is used. The initial concentration is obtained by collecting toluene gas (400 ml) and filling 5 L tetrapack with air.

  First, since neither ○ nor ● are irradiated with ultraviolet rays having an irradiation wavelength of 254 nm as a main wavelength, toluene does not decompose while maintaining the initial concentration. On the other hand, according to the organic compound decomposition apparatus of the present invention having the ultraviolet irradiation means having the irradiation wavelength of 254 nm of □ and the turbulent flow generation means, toluene could be substantially decomposed to 1 ppm or less within 1 hour. Further, an apparatus using an ultraviolet irradiation means having a main irradiation wavelength of 254 nm and a lithium catalyst was able to substantially decompose toluene to 3 ppm or less within one hour.

  Therefore, according to the present invention, it is not necessary to use lithium or platinum (Pt), which is a conventional expensive rare metal, as a catalyst. In addition, it is not necessary to use heating energy, and costs can be reduced as compared with a method in which organic compound-containing gases such as toluene and benzene are decomposed at a heating temperature of about 800 ° C. by conventional heating.

  The present invention that improves the removal rate of the organic compound component in the organic compound-containing gas and reduces the maintenance of the apparatus is very useful.

DESCRIPTION OF SYMBOLS 10 ......... Organic compound decomposition | disassembly apparatus, 20 .......... casing, 22 ....... inlet, 24 .... outlet, 26 ..... distribution path, 28 ..... duct, 30, 30A ....... turbulent flow Generating means, 32 ......... Plate, 32a ......... Recess, 32b ......... Open part, 32c ......... Side wall, 32d ......... Bottom, 34 ......... Holder, 34a ......... Bottom, 34b ......... Side wall, 34c ......... Frame portion, 36 ......... Handle, 40 ......... UV irradiation means, 42 ......... 184 nm discharge tube, 44 ......... 254 nm discharge tube, 46 ......... Outer frame, 48 ... ...... Irradiation unit, 50A, 50B ......... Cylinder, 52 ......... Inflow portion, 54 ......... Outflow portion.

Claims (6)

An inflow port for the organic compound-containing gas, an outflow port, and a casing provided with a flow path for the organic compound-containing gas between the inflow port and the outflow port;
A turbulent flow generating means attached to the inlet for generating a turbulent flow of the organic compound-containing gas in the flow path;
An ultraviolet irradiation means for decomposing an organic compound component by irradiating the organic compound-containing gas that is in a turbulent state in the flow path with ultraviolet rays;
An organic compound decomposing apparatus comprising: The turbulent flow generating means is
A plurality of U-shaped cross-section plates having recesses;
A pair of holders for supporting both longitudinal ends of the plate;
With
The plate is configured such that the openings of the recesses are alternately and continuously arranged upward and downward, and disposed on the inside of the opening facing the tip of the side wall, and the bottom surface of the opening facing the tip of the side wall The organic compound decomposing apparatus according to claim 1, wherein a gap through which the organic compound-containing gas passes is provided between the holder and the holder.   The turbulent flow generating means is attached so as to cover the inlet, and is arranged so as to intersect a horizontal plane so that one of the holders is at the lowest position. The organic compound decomposition apparatus according to 1 or 2. The holder includes a frame portion in which an end portion in a longitudinal direction of a plate in which the opening portion of the concave portion is continuously arranged alternately upward and downward is accommodated,
The organic compound decomposing apparatus according to any one of claims 1 to 3, wherein a gap is provided between a bottom surface of the frame portion of the holder and both ends of the plate in the longitudinal direction.   2. The organic compound according to claim 1, wherein the turbulent flow generating means is a cylindrical body formed in a spiral shape with the ultraviolet irradiation means as a center and covering an outer periphery along a longitudinal direction of the ultraviolet irradiation means. Disassembly equipment.   6. The organic compound decomposing apparatus according to claim 1, wherein the ultraviolet irradiation means has an irradiation wavelength of 254 nm and / or an irradiation wavelength of 184 nm as a main wavelength.

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