Ozone exhaust treatment equipment

Abstract

To provide an exhaust ozone treatment apparatus that uniformly heats the exhaust ozone gas to uniformly perform ozone decomposition treatment in an ozone decomposition catalyst.SOLUTION: An exhaust ozone treatment apparatus comprises: a heating element 91 for heating an exhaust ozone gas; a distribution pipe 6 inside of which the heating element 91 is arranged; an ozone decomposition catalyst 11 arranged by surrounding a side surface of the distribution pipe 6 in which the heating element 91 is arranged to remove ozone from the exhaust ozone gas heated by the heating element 91; and a body 1 inside of which the heating element 91, the distribution pipe 6 and the ozone decomposition catalyst 11 are arranged, where the distribution pipe 6 is a pipe that is arranged at a center in a horizontal plane of the body 1 and circulates the exhaust ozone gas from below toward above, and an area of the surface perpendicular to the direction in which the exhaust ozone gas of the ozone decomposition catalyst 11 flows is larger than the area of the surface perpendicular to a direction in which the exhaust ozone gas of the distribution pipe 6 flows.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present application relates to an exhaust ozone treatment device. [Background technology]

[0002] In an exhaust ozone treatment device that decomposes ozone using an ozone decomposition catalyst, the ozone decomposition ability of the ozone decomposition catalyst decreases when condensation occurs on the ozone decomposition catalyst. Therefore, an exhaust ozone treatment device is known in which exhaust ozone gas is heated by a heater and passed through the ozone decomposition catalyst (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-155359 A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to decompose ozone in an ozone decomposition catalyst, the linear velocity at which the exhaust ozone gas passes through the ozone decomposition catalyst, i.e., the flow velocity of the exhaust ozone gas, is preferably 0.1 m / s to 0.7 m / s, and the exhaust ozone treatment device is operated at, for example, 0.2 m / s. However, when the linear velocity at which the exhaust ozone gas passes through the ozone decomposition catalyst in the exhaust ozone device shown in Patent Document 1 is set to these values, the linear velocity of the exhaust ozone gas passing through the heater also becomes slow, and the exhaust ozone gas cannot be heated uniformly, which causes a problem that the ozone decomposition treatment in the ozone decomposition catalyst cannot be performed uniformly.

[0005] The present invention has been made to solve the above-mentioned problems, and has an object to uniformly heat exhaust ozone gas and uniformly perform ozone decomposition treatment in an ozone decomposition catalyst. [Means for solving the problem]

[0006] The exhaust ozone treatment device disclosed in the present application includes a heating element for heating exhaust ozone gas, a flow pipe in which the heating element is disposed inside the pipe, an ozone decomposition catalyst disposed surrounding a side surface of the flow pipe in which the heating element is disposed and for removing ozone from the exhaust ozone gas heated by the heating element, a body in which the heating element, the flow pipe and the ozone decomposition catalyst are disposed, and a heat insulating material disposed surrounding a side surface of the ozone decomposition catalyst on the outside of the body, the flow pipe being disposed at the center of the horizontal plane of the body and allowing the exhaust ozone gas to flow from bottom to top, and the area of ​​the surface of the ozone decomposition catalyst perpendicular to the direction in which the exhaust ozone gas flows is larger than the area of ​​the surface of the flow pipe perpendicular to the direction in which the exhaust ozone gas flows. The heating element was placed only inside the flow tube. It is characterized by: Effect of the Invention

[0007] The exhaust ozone treatment device disclosed in the present application includes a heating element for heating exhaust ozone gas, a flow pipe in which the heating element is disposed inside the pipe, an ozone decomposition catalyst disposed surrounding a side surface of the flow pipe in which the heating element is disposed and for removing ozone from the exhaust ozone gas heated by the heating element, a body in which the heating element, the flow pipe and the ozone decomposition catalyst are disposed, and a heat insulating material disposed surrounding a side surface of the ozone decomposition catalyst on the outside of the body, the flow pipe being disposed at the center of the horizontal plane of the body and allowing the exhaust ozone gas to flow from bottom to top, and the area of ​​the surface of the ozone decomposition catalyst perpendicular to the direction in which the exhaust ozone gas flows is larger than the area of ​​the surface of the flow pipe perpendicular to the direction in which the exhaust ozone gas flows. The heating element was placed only inside the flow tube. Therefore, the exhaust ozone gas can be uniformly heated, and the ozone decomposition treatment in the ozone decomposition catalyst can be performed uniformly. [Brief description of the drawings]

[0008] [Figure 1] 1 is a vertical sectional view of an exhaust ozone treatment device according to a first embodiment. FIG. [Diagram 2] 1 is a horizontal sectional view of an exhaust ozone treatment apparatus according to a first embodiment. FIG. [Diagram 3] FIG. 11 is a vertical sectional view of an exhaust ozone treatment apparatus according to a second embodiment. [Figure 4] FIG. 11 is a vertical sectional view of an exhaust ozone treatment apparatus according to a third embodiment. [Diagram 5] 13 is a diagram for explaining the configuration of a demister holder in the third embodiment. FIG. [Figure 6] 13 is a diagram for explaining a demister holding plate in the third embodiment. FIG. [Figure 7] FIG. 11 is a vertical sectional view of an exhaust ozone treatment apparatus according to a fourth embodiment. [Figure 8] FIG. 13 is a vertical sectional view of an exhaust ozone treatment apparatus according to a fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an ozone exhaust treatment device according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, the same reference numerals in each drawing indicate the same or corresponding parts.

[0010] Embodiment 1 FIG. 1 is a vertical cross-sectional view of an exhaust ozone treatment device 200 according to the first embodiment. FIG. 2 is a horizontal cross-sectional view of the exhaust ozone treatment device 200 according to the first embodiment, and is a cross-sectional view in a plane including a heating element 91 and an ozone decomposition catalyst 11. In FIG. 1, the white arrows indicate the flow of exhaust ozone gas or gas treated by the ozone decomposition catalyst 11. The body 1 is cylindrical with a circular cross section and made of metal such as stainless steel. The body 1 is placed on a base 2. The heating element 91, the flow pipe 6, the ozone decomposition catalyst 11, and the mesh demister 8 are arranged inside the body 1. The exhaust ozone gas inlet 3 takes in the exhaust ozone gas sent to the mesh demister 8 from the outside of the body 1 into the inside of the body 1, and is connected to an ozone reaction tank, an ozone reaction tower, or an ozone water generation device tank (not shown) by piping. The treated gas outlet 4 is used to discharge the treated gas, from which ozone has been removed by the ozone decomposition catalyst 11, from inside the body 1 to the outside of the body 1, and is connected to an exhaust ozone fan (not shown). The treated gas outlet 4 may be open to the atmosphere either nearby or after passing through a pipe. The exhaust ozone gas inlet 3 and the treated gas outlet 4 are nozzle-shaped and attached to the body 1 by welding or the like.

[0011] The partition plate 5 guides the exhaust ozone gas taken in from the exhaust ozone gas inlet 3 to the mesh demister 8, guides the treated gas coming out of the ozone decomposition catalyst 11 to the treated gas outlet 4, and prevents the exhaust ozone gas and the treated gas from mixing. The partition plate 5 is made of a metal such as stainless steel. The flow pipe 6 is a cylindrical pipe with a circular cross section and is made of a metal such as stainless steel. The flow pipe 6 is disposed in the center of the horizontal plane of the body 1, and is a pipe that allows the exhaust ozone gas to flow from bottom to top. The partition plate 5 has a hole in the center that is equal in size to the diameter of the cross section of the flow pipe 6, and the periphery of the hole in the center and the lower end of the flow pipe 6 are joined by welding or the like so that no gas flows through them. The flow pipe 6 stands upright on the partition plate 5, and the exhaust ozone gas taken in from the exhaust ozone gas inlet 3 flows through the space below the partition plate 5 and inside the flow pipe 6.

[0012] The part of the body 1 below the exhaust ozone gas inlet 3 is a drain tank 7 for storing drain water. The side wall of the drain tank 7 is the lower part of the body 1, and the side wall of the drain tank 7 is cylindrical. The diameter of the drain tank 7 in a horizontal cross section on the inside of the side wall is the same as the diameter of the horizontal cross section on the inside of the side wall of the body 1 at the height where the ozone decomposition catalyst 11 is stored. By making a part of the body 1 the drain tank 7, it is not necessary to separately manufacture and install the drain tank 7, and the number of parts of the exhaust ozone treatment device 200 can be reduced and the size of the exhaust ozone treatment device 200 can be reduced. In addition, by making the diameter of the drain tank 7 in a horizontal cross section on the inside of the side wall the same as the diameter of the horizontal cross section on the inside of the side wall of the body 1 at the height where the ozone decomposition catalyst 11 is stored, the body 1 including the drain tank 7 can be made as a cylindrical member with a circular cross section having one diameter, and the body 1 can be easily made. Furthermore, it is easier to increase the capacity of the drain tank compared to a drain tank made using a pipe or the like. When using an exhaust ozone treatment device that does not have a drain tank, the exhaust ozone treatment device is installed above an ozone water generation device, an ozone treatment tower, or an ozone reaction tank, and drain water discharged from the exhaust ozone treatment device is dropped into the ozone water generation device, the ozone treatment tower, or the ozone reaction tank. Since the exhaust ozone treatment device 200 according to the first embodiment has the drain tank 7 built in the exhaust ozone treatment device 200, there are no restrictions on the installation location of the exhaust ozone treatment device 200, and the exhaust ozone treatment device 200 can be installed in a location away from the ozone water generation device, the ozone treatment tower, or the ozone reaction tank.

[0013] The mesh demister 8 is a cylindrical mesh made of a metal such as stainless steel that removes liquid particles from the exhaust ozone gas. The mesh demister 8 is installed at the lower end of the inside of the flow pipe 6. The heater 9 is composed of a heating element 91, a heater terminal box 92, and a heater flange 93. The heating element 91 heats the exhaust ozone gas and is arranged above the mesh demister 8 inside the flow pipe 6. With the above configuration, the exhaust ozone gas taken in from the exhaust ozone gas inlet 3 is heated by the heating element 91 after passing through the mesh demister 8. The heater flange 93 is fixed to the inner flange of the body 1 (not shown) by a removable means such as bolting via a seal member such as a gasket. As a result, the heater flange 93 is configured to seal the upper part of the body 1. 1, the heater flange 93 covers the entire upper end of the body 1, but an inner flange portion of the body 1 (not shown) may be configured to cover part of the upper end of the body 1, and the heater flange 93 may cover the opening of the inner flange portion. The heater terminal box 92 is connected to electric wires from a power source and is located on the upper part of the body 1.

[0014] The catalyst holder 10 supports the ozone decomposition catalyst 11. The catalyst holder 10 is, for example, a punched metal, and is fixed to the inside of the body 1 and the outside of the flow pipe 6 by spot welding. Since the catalyst holder 10 does not need to fall, a protruding stopper may be provided on the inside of the body 1 or the outside of the flow pipe 6, and the catalyst holder 10 may simply be placed on the stopper, and fixing by welding or the like is not essential. The catalyst holder 10 may have any shape as long as it supports the ozone decomposition catalyst 11 and allows the treated gas discharged from the ozone decomposition catalyst 11 to flow, and may be a protruding stopper provided on the inside of the body 1 or the outside of the flow pipe 6. Furthermore, the catalyst holder 10 may be a punched metal, a member formed in a lattice shape, a mesh, or a combination of these. The ozone decomposition catalyst 11 is arranged to surround the side of the flow pipe 6 in which the heating element 91 is arranged, and removes ozone from the exhaust ozone gas heated by the heating element 91. The ozone decomposition catalyst 11 is made of, for example, manganese dioxide, and is filled between the flow pipe 6 and the body 1 in the form of small granules, so-called pellets, which may be spherical, cylindrical, or irregular. The ozone decomposition catalyst 11 may be, for example, a combination of a catalyst and activated carbon, or a combination of a special activated carbon called SEKADO and a catalyst. When the activated carbon and the catalyst are combined, or when the special activated carbon and the catalyst are combined, the catalyst is filled on the upstream side of the flow of the exhaust ozone gas, and the activated carbon or the special activated carbon is filled on the downstream side of the flow of the exhaust ozone gas. In the exhaust ozone treatment device in which the flow passage is formed by drilling a hole in the center of the honeycomb catalyst without using the flow pipe 6 and the catalyst holder 10, only a catalyst that can maintain its shape by itself, such as a honeycomb catalyst, can be used as the catalyst. In the exhaust ozone treatment device 200 according to the first embodiment, the body 1, the flow pipe 6, and the catalyst holder 10 form a container in which the ozone decomposition catalyst 11 is filled. Therefore, not only a honeycomb catalyst but also a pellet-shaped catalyst can be used as the ozone decomposition catalyst 11, and there are fewer restrictions on the shape of the ozone decomposition catalyst 11.

[0015] The heat insulating material 12 is disposed on the outside of the body 1 so as to surround the side of the ozone decomposition catalyst 11. For example, the heat insulating material 12 covers the outside of the body 1 from the upper end of the body 1 to the height at which the catalyst holder 10 is installed, or from the upper end of the body 1 to a position below the height at which the catalyst holder 10 is installed. The heat insulating material 12 further covers the upper end of the body 1 and the upper part of the heater flange 93. For example, glass wool, rock wool, polystyrene, or the like is used for the heat insulating material 12. The outside of the heat insulating material 12 may be covered with a silver paper-like exterior paper or a thin metal exterior material.

[0016] 1, the body 1 is shown as being cylindrical as a whole, but it may be made by manufacturing each part in a divided state and then joining the parts together in the end in order to process the partition plate 5, catalyst holder 10, etc. inside. When joining the parts together, making each part cylindrical with the same diameter makes it easier to join the parts together.

[0017] Next, the operation of the exhaust ozone treatment device 200 will be described. First, the ozone reaction tank, ozone reaction tower, and ozone water generation device tank (not shown) will be described. The ozone reaction tank is a treatment tank in which high-concentration ozone gas is injected into the water to be treated by an aeration tube or an aeration disk when ozone treatment is performed as advanced water purification treatment in a water purification plant or the like, and usually exhaust ozone gas containing unreacted ozone is discharged. The ozone reaction tower is a reaction tank used, for example, when ozone treatment is performed on industrial wastewater, and high-concentration ozone is injected into the water to be treated by an aeration disk or the like. At this time, usually exhaust ozone gas containing unreacted ozone is discharged. The ozone water generation device tank is used to generate ozone water, and is a tank for storing ozone water generated by injecting high-concentration ozone into tap water by an aeration disk or an injector, for example. Usually exhaust ozone gas containing undissolved ozone is discharged. The main component of the exhaust ozone gas may be oxygen or air depending on the raw material gas used to manufacture the injected high-concentration ozone. The amount of exhaust ozone gas is several ppm and several tens of g / m 3It contains ozone at a concentration of (N) or several wt percent, and since it is often derived from gas that has passed through the water, it often contains moisture close to the amount of saturated water vapor and mist which is fine liquid particles.

[0018] Since the ozone reaction tank has low airtightness, when the exhaust ozone gas discharged from the ozone reaction tank is treated by the exhaust ozone treatment device 200, a fan (not shown) is installed downstream of the treated gas outlet 4 to suck the exhaust ozone gas from the ozone reaction tank in order to prevent leakage of the exhaust ozone gas. Also, the ozone reaction tower or the ozone water generation tank has high airtightness, and the gas pressure inside the ozone reaction tower or the ozone water generation tank is high. Therefore, when the exhaust ozone gas discharged from the ozone reaction tower or the ozone water generation tank is treated by the exhaust ozone treatment device 200, the exhaust ozone gas is forced into the exhaust ozone treatment device 200 from the ozone reaction tower or the ozone water generation tank.

[0019] The ozone reaction tank, the ozone reaction tower, or the ozone water generation tank is connected to the exhaust ozone gas inlet 3, and the exhaust ozone gas from the ozone reaction tank, the ozone reaction tower, or the ozone water generation tank is taken into the inside of the body 1 through the exhaust ozone gas inlet 3. The exhaust ozone gas taken in from the exhaust ozone gas inlet 3 flows into the flow pipe 6. The exhaust ozone gas taken in from the exhaust ozone gas inlet 3 passes through a mesh demister 8, and liquid particles contained in the exhaust ozone gas are removed. The liquid particles removed in the mesh demister 8 become water droplets, fall from the mesh demister 8, and are stored in the drain tank 7 as drain water. The exhaust ozone gas from which the liquid particles have been removed is heated by the heating element 91 of the heater 9, and is sent to the ozone decomposition catalyst 11 in a state where the relative humidity has been reduced. The ozone contained in the exhaust ozone gas is converted into oxygen by the ozone decomposition catalyst 11, and the treated gas from which the ozone has been removed is discharged from the treated gas outlet 4 to the outside of the body 1.

[0020] When condensation occurs on the ozone decomposition catalyst 11, the performance is reduced or the life is shortened due to deterioration, so the ozone decomposition catalyst 11 must be heated as well as the exhaust ozone gas. In the exhaust ozone treatment device 200, the ozone decomposition catalyst 11 is disposed surrounding the side of the flow pipe 6 in which the heating element 91 is disposed. Furthermore, in the exhaust ozone treatment device 200, the heat insulating material 12 is disposed surrounding the side of the body 1 in which the ozone decomposition catalyst 11 is disposed. With these configurations, both the exhaust ozone gas and the ozone decomposition catalyst 11 can be heated by the single heating element 91, both the exhaust ozone gas and the ozone decomposition catalyst 11 can be kept warm by the single heat insulating material 12, and burns caused by contact between the heated body 1 and a person can be prevented by the single heat insulating material 12. Furthermore, with these configurations, the size of the exhaust ozone treatment device 200 can be reduced, and the installation area of ​​the exhaust ozone treatment device 200 can be reduced.

[0021] In order to remove ozone from the exhaust ozone gas by the ozone decomposition catalyst 11, the linear velocity at which the exhaust ozone gas passes through the ozone decomposition catalyst 11, i.e., the flow velocity of the exhaust ozone gas, is preferably 0.1 m / s to 0.7 m / s, and needs to be, for example, 0.2 m / s. On the other hand, since the flow velocity in the piping including the nozzle part of the exhaust ozone gas inlet 3 is about 1 m / s to 5 m / s, the cross-sectional area of ​​the ozone decomposition catalyst 11, which is the area of ​​the surface perpendicular to the direction in which the exhaust ozone gas flows, needs to be larger than the cross-sectional area of ​​the exhaust ozone gas inlet 3, which is the area of ​​the surface perpendicular to the direction in which the exhaust ozone gas flows in the piping of the exhaust ozone gas inlet 3. In addition, the heating element 91 is disposed inside the flow pipe 6, and in order to uniformly heat the exhaust ozone gas by the heating element 91, it is necessary to increase the flow velocity of the exhaust ozone gas passing through the flow pipe 6. Therefore, in the exhaust ozone treatment device 200, the area of ​​the surface of the ozone decomposition catalyst 11 perpendicular to the direction in which the exhaust ozone gas flows is made larger than the area of ​​the surface of the flow pipe 6 perpendicular to the direction in which the exhaust ozone gas flows. That is, the area of ​​the portion indicated by the diagonal line downward to the right in FIG. 2 is larger than the area of ​​the white portion inside the flow pipe 6. As a result, the flow rate of the exhaust ozone gas passing through the flow pipe 6 becomes faster than the flow rate of the exhaust ozone gas passing through the ozone decomposition catalyst 11, and all the exhaust ozone gas passing through the flow pipe 6 is affected by the heat generated by the heating element 91, so that the exhaust ozone gas can be uniformly heated by the heating element 91. By uniformly heating the exhaust ozone gas, the ozone decomposition treatment in the ozone decomposition catalyst 11 can be performed uniformly. In addition, since the heating element 91 is disposed inside the flow pipe 6 having a small area of ​​the surface perpendicular to the direction in which the exhaust ozone gas flows, the exhaust ozone gas can be uniformly heated by the small heating element 91 compared to the case where the heating element 91 is disposed outside the flow pipe 6.

[0022] The mesh demister 8 removes liquid particles from the exhaust ozone gas by colliding the liquid particles contained in the exhaust ozone gas with a mesh. Therefore, when the flow rate of the exhaust ozone gas containing the liquid particles is slower than 1.5 m / s or 2 m / s, the collection efficiency of the liquid particles, i.e., the removal efficiency of the liquid particles, decreases. Therefore, the linear velocity at which the exhaust ozone gas passes through the mesh demister 8, i.e., the flow rate of the exhaust ozone gas, needs to be faster than 1.5 m / s or 2 m / s. In the exhaust ozone treatment device 200, the mesh demister 8 is installed at the lower end inside the flow pipe 6, and the area of ​​the surface of the ozone decomposition catalyst 11 perpendicular to the flow direction of the exhaust ozone gas is larger than the area of ​​the surface of the flow pipe 6 perpendicular to the flow direction of the exhaust ozone gas, so that the flow rate of the exhaust ozone gas passing through the mesh demister 8 is faster than the flow rate of the exhaust ozone gas passing through the ozone decomposition catalyst 11, and the mesh demister 8 can be used in a state where the removal efficiency of the liquid particles is high. The flow pipe 6 forms a container filled with the ozone decomposition catalyst 11 on its outer side, and has the function of circulating exhaust ozone gas inside its narrow cross section and housing inside the heating element 91 and mesh demister 8. Therefore, in the exhaust ozone treatment device 200, there is no need to provide an additional container for housing the mesh demister 8, and the number of parts is small and the device is compact.

[0023] 1 shows a case where the diameter of the flow pipe 6 in the portion where the heating element 91 is provided is equal to the diameter of the flow pipe 6 in the portion where the mesh demister 8 is provided, but the diameter of the flow pipe 6 in the portion where the heating element 91 is provided may be different from the diameter of the flow pipe 6 in the portion where the mesh demister 8 is provided, as long as the area of ​​the surface of the ozone decomposition catalyst 11 perpendicular to the direction in which the exhaust ozone gas flows is larger than the area of ​​the surface of the flow pipe 6 perpendicular to the direction in which the exhaust ozone gas flows. For example, the diameter of the flow pipe 6 in the portion where the heating element 91 is provided may be determined according to the heating capacity or arrangement of the heating element 91, and the diameter of the flow pipe 6 in the portion where the mesh demister 8 is provided may be determined according to the configuration or shape of the mesh demister 8. When the diameter of the flow pipe 6 in the portion where the heating element 91 is provided is different from the diameter of the flow pipe 6 in the portion where the mesh demister 8 is provided, a reducer may be provided between the portion where the heating element 91 is provided and the portion where the mesh demister 8 is provided.

[0024] As described above, the exhaust ozone treatment device 200 according to the first embodiment includes the heating element 91 that heats the exhaust ozone gas, the flow pipe 6 in which the heating element 91 is arranged inside the pipe, the ozone decomposition catalyst 11 that is arranged surrounding the side of the flow pipe 6 in which the heating element 91 is arranged and removes ozone from the exhaust ozone gas heated by the heating element 91, the body 1 in which the heating element 91, the flow pipe 6 and the ozone decomposition catalyst 11 are arranged, and the insulating material 12 that is arranged surrounding the side of the ozone decomposition catalyst 11 on the outside of the body 1. The flow pipe 6 is arranged in the center of the horizontal plane of the body 1 and is a pipe that flows the exhaust ozone gas from bottom to top. The area of ​​the surface of the ozone decomposition catalyst 11 perpendicular to the direction in which the exhaust ozone gas flows is larger than the area of ​​the surface of the flow pipe 6 perpendicular to the direction in which the exhaust ozone gas flows, so that the exhaust ozone gas can be heated uniformly and the ozone decomposition treatment in the ozone decomposition catalyst 11 can be performed uniformly.

[0025] Furthermore, the exhaust ozone treatment device 200 according to embodiment 1 is equipped with a mesh demister 8 that removes liquid fine particles from the exhaust ozone gas. The mesh demister 8 is disposed inside the flow pipe 6, and the heating element 91 heats the exhaust ozone gas that has passed through the mesh demister 8. This allows the mesh demister 8 to be used in a state where the efficiency of removing liquid fine particles is high, and there is no need to provide a new container to house the mesh demister 8, resulting in a small size with a small number of parts.

[0026] Furthermore, in the waste ozone treatment device 200 according to embodiment 1, the mesh demister 8 is disposed at the lower end of the flow pipe 6, and the heating element 91 is disposed above the mesh demister 8, so that the liquid removed by the mesh demister 8 does not fall onto the heating element 91.

[0027] Furthermore, the exhaust ozone treatment device 200 according to the first embodiment includes an exhaust ozone gas inlet 3 for taking in the exhaust ozone gas sent to the mesh demister 8 from the outside of the body 1 to the inside of the body 1, a treated gas outlet 4 for discharging the treated gas from which ozone has been removed by the ozone decomposition catalyst 11 from the inside of the body 1 to the outside of the body 1, and a partition plate 5 for guiding the exhaust ozone gas taken in from the exhaust ozone gas inlet 3 to the mesh demister 8 and guiding the treated gas discharged from the ozone decomposition catalyst 11 to the treated gas outlet 4, and preventing the exhaust ozone gas and the treated gas from mixing, so that a small device having the heating element 91, the ozone decomposition catalyst 11, and the mesh demister 8 built in one body 1 can obtain treated gas from the exhaust ozone gas. Compared to a configuration in which the individual housings of the heating element 91, the ozone decomposition catalyst 11, and the mesh demister 8 are connected by piping, the installation area is smaller and there is no need to connect them by piping. Compared to a configuration in which the heating element 91 is outside the fuselage 1, insulation material is not required just for the heating element 91, and insulation material for the piping connecting the external heating element 91 and the fuselage 1 is also not required.

[0028] Embodiment 2 FIG. 3 is a vertical cross-sectional view showing the configuration of the exhaust ozone treatment device 200a according to the second embodiment. Compared with the exhaust ozone treatment device 200 according to the first embodiment shown in FIG. 1, the exhaust ozone treatment device 200a according to the second embodiment shown in FIG. 3 does not include the mesh demister 8, the drain tank 7, and the partition plate 5, and the exhaust ozone gas inlet 3a and the flow pipe 6 are directly connected via piping members called a reducer and an elbow. The other configuration of the exhaust ozone treatment device 200a according to the second embodiment is the same as that of the exhaust ozone treatment device 200 according to the first embodiment. The mesh demister 8 and the drain tank 7 are provided upstream of the exhaust ozone gas inlet 3a and are not shown in FIG. 3. The exhaust ozone treatment device 200a according to the second embodiment does not include the partition plate 5, so that less welding work is required inside the fuselage 1 compared to the exhaust ozone treatment device 200 according to the first embodiment. In the exhaust ozone treatment device 200a according to the second embodiment, piping is required to connect the exhaust ozone gas inlet 3a and the flow pipe 6. However, piping that has been prepared in advance outside the body 1 can be connected to the exhaust ozone gas inlet 3a and the flow pipe 6.

[0029] In the exhaust ozone treatment device 200a according to the second embodiment shown in Fig. 3, exhaust ozone gas from which liquid particles have been removed by a mesh demister 8 (not shown) is taken in from an exhaust ozone gas inlet 3a, and is heated by a heating element 91 in the flow pipe 6 to reduce the relative humidity. The subsequent operations are the same as those of the exhaust ozone treatment device 200 according to the first embodiment. In the exhaust ozone treatment device 200a according to the second embodiment, as in the exhaust ozone treatment device 200 according to the first embodiment, the area of ​​the surface of the ozone decomposition catalyst 11 perpendicular to the direction in which the exhaust ozone gas flows is larger than the area of ​​the surface of the flow pipe 6 perpendicular to the direction in which the exhaust ozone gas flows, so that the exhaust ozone gas can be uniformly heated and the ozone decomposition treatment in the ozone decomposition catalyst 11 can be uniformly performed. Compared to a configuration in which the individual housings of the heating element 91 and the ozone decomposition catalyst 11 are connected by piping, the installation area is smaller and there is no need to connect them by piping. Compared to a configuration in which the heating element 91 is outside the body 1, no insulation material is required just for the heating element 91, and no insulation material is required for the piping connecting the external heating element 91 and the body 1. Since the exhaust ozone gas inlet 3a is provided to take in the exhaust ozone gas horizontally from the side of the body 1, and the exhaust ozone gas inlet 3a is directly connected to the flow pipe 6, the exhaust ozone processing device 200a can be installed on an ordinary floor surface, which has the effect of increasing the degree of freedom in installation. Note that, although an example in which the diameter of the flow pipe 6 is larger than the diameter of the exhaust ozone gas inlet 3a is shown in Fig. 3, the diameter of the flow pipe 6 may be the same as the diameter of the exhaust ozone gas inlet 3a, or the diameter of the flow pipe 6 may be smaller than the diameter of the exhaust ozone gas inlet 3a.

[0030] Embodiment 3 Fig. 4 is a vertical sectional view showing the configuration of exhaust ozone treatment device 200b according to embodiment 3. When comparing exhaust ozone treatment device 200b according to embodiment 3 shown in Fig. 4 with exhaust ozone treatment device 200 according to embodiment 1 shown in Fig. 1, exhaust ozone treatment device 200b according to embodiment 3 shown in Fig. 4 has demister holder 13 supporting mesh demister 8 at the lower opening of flow pipe 6, and has inspection hatch 14 for operating demister holder 13 from outside body 1. The other configuration of exhaust ozone treatment device 200b according to embodiment 3 is the same as that of exhaust ozone treatment device 200 according to embodiment 1.

[0031] Fig. 5 is a diagram for explaining the configuration of the demister holder 13 in embodiment 3. Fig. 5 shows a part of the lower side of the flow pipe 6, the mesh demister 8, the partition plate 5, and the demister holder 13. The demister holder 13 is composed of a demister holding plate 131, a hinge fixing plate 132, a hinge 133, a stud bolt 134, and a thumbscrew nut 135.

[0032] Fig. 6 is a diagram for explaining the demister holding plate 131 in the third embodiment. Fig. 6 is a diagram of the demister holding plate 131 attached to the lower opening of the flow pipe 6, viewed from below. The demister holding plate 131 is a square metal thin plate, and has a circular opening equal in diameter to the lower end of the flow pipe 6. The demister holding plate 131 is provided with thin rod-shaped members stacked in a cross shape at the opening, and these rod-shaped members support the mesh demister 8. In addition, a U-shaped groove is provided on one side of the demister holding plate 131.

[0033] As shown in Fig. 5, the hinge fixing plate 132 is fixed perpendicularly to the partition plate 5 by welding or the like. The demister holding plate 131 and the hinge fixing plate 132 are connected via a hinge 133, and the demister holding plate 131 can be moved within a range of approximately 90 degrees by the hinge 133. The stud bolt 134 is fixed to the partition plate 5 by welding or the like, aligned with the position of the U-shaped groove of the demister holding plate 131. The demister holding plate 131 is fixed by a thumbscrew nut 135 screwed from the tip of the stud bolt 134. The inspection hatch 14 is a nozzle-shaped opening larger than the exhaust ozone gas inlet 3, and is closed by a closing flange when exhaust ozone treatment is performed.

[0034] The mesh demister 8 is inserted into the inside of the flow pipe 6 from below. In this state, the mesh demister 8 may fall due to vibration or the like, so the mesh demister 8 is supported by the demister holding plate 131 to prevent the mesh demister 8 from falling. In addition, when the mesh demister 8 becomes dirty or deteriorated, it is necessary to replace the mesh demister 8. When replacing the mesh demister 8, the thumbscrew nut 135 is loosened and removed from the stud bolt 134, and the demister holding plate 131 rotates to a vertical position by its own weight, and the lower end of the flow pipe 6 is opened, so that the mesh demister 8 can be taken out. After inserting the new mesh demister 8 into the flow pipe 6, the demister holding plate 131 is returned to a horizontal position and fixed by the thumbscrew nut 135. The above-mentioned replacement work of the mesh demister 8 can be performed by inserting a hand through the inspection hatch 14.

[0035] The demister holder 13 is not limited to those shown in Figs. 4, 5 and 6, and may be any type that supports the mesh demister 8 and does not impede the flow of exhaust ozone gas. Any type may be used as long as the mesh demister 8 can be replaced by opening and closing the demister holder 13. The demister holder 13 may include, for example, a lattice- or mesh-shaped plate member, or a plate member such as the demister holding plate 131 may be fixed to the partition plate 5 by a screw. Alternatively, the plate member may rotate in the horizontal direction around one fulcrum, or the plate member may move in parallel in the horizontal direction along a rail fixed to the partition plate 5.

[0036] As described above, the exhaust ozone treatment device 200b according to the third embodiment is provided with the demister holder 13 that supports the mesh demister 8 at the lower opening of the flow pipe 6, and therefore can prevent the mesh demister 8 from falling due to transportation or vibration. Furthermore, the exhaust ozone treatment device 200b according to the third embodiment is provided with an inspection hatch 14 for operating the demister holder 13 from outside the body 1, and therefore the mesh demister 8 can be easily replaced.

[0037] Embodiment 4 Fig. 7 is a vertical cross-sectional view showing the configuration of an exhaust ozone treatment device 200c according to embodiment 4. Comparing the exhaust ozone treatment device 200c according to embodiment 4 shown in Fig. 7 with the exhaust ozone treatment device 200 according to embodiment 1 shown in Fig. 1, the exhaust ozone treatment device 200c according to embodiment 4 includes a drain outlet 15 for discharging drain water from the drain tank 7, a valve 16 for opening and closing the drain outlet 15, a drain tank bottom plate 17 arranged at the bottom of the drain tank 7 and inclined toward the drain outlet 15, and a water level gauge 18 for indicating the water level of drain water, which is liquid accumulated in the drain tank 7. The other configurations of the exhaust ozone treatment device 200c according to embodiment 4 are the same as those of the exhaust ozone treatment device 200 according to embodiment 1.

[0038] Drain outlet 15 is provided at the bottom of drain tank 7, and drain water accumulated in drain tank 7 can be discharged from drain outlet 15. If valve 16 is a manual valve, drain water can be discharged at any time. If valve 16 is an electric valve such as a motor valve or a solenoid valve, drain water may be discharged periodically using a timer (not shown), or drain water may be discharged when the water level exceeds a predetermined value based on information from a water level sensor (not shown).

[0039] When the drain water level reaches above the lower end of the exhaust ozone gas inlet 3, it impedes the flow of exhaust ozone gas. For this reason, for example, the drain water level is periodically checked using a water level gauge 18, and when it exceeds a predetermined water level, the drain water is discharged from the drain outlet 15. Note that although the drain tank bottom plate 17 is shown in FIG. 7 as a plate-like member whose thickness varies, it may be a thin plate with an inclination. If the drain tank bottom plate 17 is a thin plate with an inclination, the shaded portion shown as the drain tank bottom plate 17 in FIG. 7 becomes a space.

[0040] The exhaust ozone treatment device 200c according to the fourth embodiment includes the drain tank bottom plate 17 disposed at the bottom of the drain tank 7 and inclined toward the drain outlet 15, so that all of the drain water accumulated in the lower part of the drain tank 7 can be discharged. When the exhaust ozone treatment device 200c is stopped for a long period of time, all of the drain water is discharged, so that it is possible to prevent the remaining drain water from evaporating and adversely affecting the ozone decomposition catalyst 11.

[0041] When drain water is discharged while the exhaust ozone treatment device 200c is in operation, if the drain water is completely removed, exhaust ozone gas may be discharged from the drain outlet 15. Therefore, when drain water is discharged while the exhaust ozone treatment device 200c is in operation, the valve 16 is operated while checking the water level gauge 18, and the drain water is discharged within a water level range where exhaust ozone gas is not discharged. Therefore, it is preferable to install the water level gauge 18 in a position where it can be visually confirmed while operating the valve 16.

[0042] As described above, the exhaust ozone treatment device 200c according to the fourth embodiment is provided with the drain outlet 15 for discharging the drain water from the drain tank 7, and therefore the drain water can be easily discharged from the drain tank 7. Furthermore, the exhaust ozone treatment device 200c according to the fourth embodiment is provided with the drain tank bottom plate 17 that is disposed at the bottom of the drain tank 7 and inclined toward the drain outlet 15, and therefore the drain water accumulated in the lower part of the drain tank 7 can be discharged without remaining. Furthermore, the exhaust ozone treatment device 200c according to the fourth embodiment is provided with the water level gauge 18 that indicates the water level of the drain water, and therefore it is possible to know whether the drain water has accumulated to a level at which it is necessary to drain the drain water from the drain outlet 15, and to know whether it is necessary to stop discharging the drain water so as not to discharge the exhaust ozone gas when discharging the drain water during the operation of the exhaust ozone treatment device 200c.

[0043] Embodiment 5. Fig. 8 is a vertical sectional view showing the configuration of an exhaust ozone treatment device 200d according to embodiment 5. When comparing the exhaust ozone treatment device 200d according to embodiment 5 shown in Fig. 8 with the exhaust ozone treatment device 200 according to embodiment 1 shown in Fig. 1, the body 1 has become a body 1a, the drain tank 7 has become a drain tank 7a, and the base 2 has become a base 2a. The other configuration of the exhaust ozone treatment device 200d according to embodiment 5 is the same as the configuration of the exhaust ozone treatment device 200 according to embodiment 1.

[0044] The drain tank 7a has a cylindrical side wall, and the diameter of the drain tank 7a in a horizontal cross section inside the side wall is larger than the diameter of the side wall of the body 1a at the height where the ozone decomposition catalyst 11 is stored. The body 1a is installed on the base 2a. By making the diameter of the drain tank 7a in a horizontal cross section inside the side wall larger than the diameter of the side wall of the body 1a at the height where the ozone decomposition catalyst 11 is stored, a large amount of drain water can be stored, and the frequency of drain water discharge can be reduced. In addition, in an exhaust ozone treatment device having a small diameter in a horizontal cross section inside the side wall of the body 1a at the height where the ozone decomposition catalyst 11 is stored, the cross-sectional area of ​​the drain tank 7a located below the exhaust ozone treatment device is increased, thereby improving the stability of the installation.

[0045] Although the present application describes various exemplary embodiments, the various features, aspects, and functions described in one or more embodiments are not limited to application to a particular embodiment, but may be applied to the embodiments alone or in various combinations. Therefore, countless modifications not exemplified are assumed within the scope of the technology disclosed in this application, including, for example, modifying, adding, or omitting at least one component, and further, extracting at least one component and combining it with a component of another embodiment. [Explanation of symbols]

[0046] 1, 1a body, 2, 2a base, 3, 3a exhaust ozone gas inlet, 4 treated gas outlet, 5 partition plate, 6 circulation pipe, 7, 7a drain tank, 8 mesh demister, 9 heater, 10 catalyst holder, 11 ozone decomposition catalyst, 12 heat insulating material, 13 demister holder, 14 inspection port, 15 drain port, 16 valve, 17 drain tank bottom plate, 18 water level gauge, 91 heating element, 92 heater terminal box, 93 heater flange, 131 demister holder plate, 132 hinge fixing plate, 133 hinge, 134 stud bolt, 135 thumbscrew nut, 200, 200a, 200b, 200c, 200d exhaust ozone treatment device.

Claims

1. a heating element for heating the exhaust ozone gas; a flow tube with the heating element disposed inside the tube; an ozone decomposition catalyst disposed around a side surface of the flow pipe in which the heating element is disposed, and configured to remove ozone from the exhaust ozone gas heated by the heating element; a body having the heating element, the flow pipe, and the ozone decomposition catalyst disposed therein; a heat insulating material disposed outside the body and surrounding a side surface of the ozone decomposition catalyst; the flow pipe is disposed at the center of the horizontal plane of the body, and is a pipe for flowing the exhaust ozone gas from bottom to top, an area of ​​a surface of the ozone decomposition catalyst perpendicular to the direction in which the exhaust ozone gas flows is larger than an area of ​​a surface of the flow pipe perpendicular to the direction in which the exhaust ozone gas flows; The ozone exhaust treatment device is characterized in that the heating element is disposed only inside the flow pipe.

2. a mesh demister for removing liquid fine particles from the exhaust ozone gas; the mesh demister is disposed inside the flow pipe; 2. The apparatus according to claim 1, wherein the heating element heats the exhaust ozone gas that has passed through the mesh demister.

3. The mesh demister is disposed at a lower end of the flow pipe, 3. The ozone exhaust treatment system of claim 2, wherein the heating element is disposed above the mesh demister.

4. an exhaust ozone gas inlet for taking the exhaust ozone gas sent to the mesh demister from the outside of the body into the inside of the body; a treated gas outlet for discharging treated gas from which ozone has been removed by the ozone decomposition catalyst from the inside of the body to the outside of the body; 4. The exhaust ozone treatment device according to claim 3, further comprising a partition plate for guiding the exhaust ozone gas taken in through the exhaust ozone gas inlet to the mesh demister and guiding the treated gas discharged from the ozone decomposition catalyst to the treated gas outlet, and preventing the exhaust ozone gas and the treated gas from mixing.

5. 5. The ozone exhaust treatment apparatus according to claim 4, further comprising a demister holder for supporting the mesh demister at a lower opening of the flow pipe.

6. 6. The ozone exhaust treatment device according to claim 5, further comprising an access hatch for operating the demister holder from outside the body.

7. a drain tank for storing the liquid removed by the mesh demister as drain water; 7. The ozone exhaust treatment device according to claim 4, wherein a side wall of the drain tank is a lower part of the body.

8. The body is cylindrical, The side wall of the drain tank is cylindrical, 8. The ozone decomposition device according to claim 7, wherein the diameter of the drain tank in a horizontal cross section on the inner side of the side wall is the same as the diameter of the drain tank in a horizontal cross section on the inner side of the side wall of the body at a height at which the ozone decomposition catalyst is housed.

9. The body is cylindrical, The side wall of the drain tank is cylindrical, 8. The ozone decomposition device according to claim 7, wherein the diameter of the drain tank in a horizontal cross section on the inner side of the side wall is larger than the diameter of the drain tank in a horizontal cross section on the inner side of the side wall of the body at a height at which the ozone decomposition catalyst is housed.

10. 10. The ozone exhaust treatment device according to claim 7, further comprising a drain outlet for discharging the drain water from the drain tank.

11. The ozone exhaust treatment device according to claim 10, further comprising a drain tank bottom plate disposed at a bottom of the drain tank and inclined toward the drain outlet.

12. 12. The ozone exhaust treatment device according to claim 7, further comprising a water level indicator for indicating a water level of the drain water.

13. 2. The exhaust ozone treatment device according to claim 1, further comprising an exhaust ozone gas inlet for taking in the exhaust ozone gas horizontally from a side surface of the body, the exhaust ozone gas inlet being directly connected to the flow pipe.

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