A hazardous waste incineration flue gas treatment device

Abstract

This utility model discloses a hazardous waste incineration flue gas treatment device, belonging to the field of hazardous waste treatment technology. It includes a photocatalytic component and a jet mixing component. The photocatalytic component includes a mesh cylinder for catalytic oxidation and an ultraviolet lamp. The ultraviolet lamp is located in the middle of the mesh cylinder and connected to its bottom. The jet mixing component includes a jet unit, which includes a first connector for inputting liquid flow, a second connector for inputting dioxin-containing flue gas, a third connector for inputting ozone, and a fourth connector. The high-speed flowing liquid flow can fully mix with the flue gas and ozone. The fourth connector is connected to the top of the mesh cylinder. This utility model can fully catalytically oxidize dioxins.

Description

Technical Field

[0001] This utility model relates to the field of hazardous waste treatment technology, and in particular to a hazardous waste incineration flue gas treatment device. Background Technology

[0002] Hazardous waste is solid waste generated in daily life and production. Due to its large volume, complex and diverse composition, and its polluting, resource-related, and social characteristics, it requires harmless, resource-recovery, volume-reduction, and socialized treatment. If it is not properly treated, it will pollute the environment, affect environmental sanitation, waste resources, and undermine the safety of production and life.

[0003] In the current process of treating hazardous waste, incineration is required, which produces dioxins in the flue gas. Therefore, corresponding elimination equipment is needed. However, in actual use, the existing elimination equipment is difficult to fully catalytically oxidize dioxins, resulting in dioxin residues. Utility Model Content

[0004] In view of this, it is necessary to provide a hazardous waste incineration flue gas treatment device to solve the problem of dioxins remaining in hazardous waste incineration flue gas due to the difficulty in fully catalytic oxidation.

[0005] This utility model provides a hazardous waste incineration flue gas treatment device, comprising: A photocatalytic component, comprising a mesh tube for catalytic oxidation and an ultraviolet lamp, wherein the ultraviolet lamp is disposed in the middle of the mesh tube and connected to the bottom of the mesh tube; A jet mixing assembly includes a jet unit, which includes a first connector for inputting liquid flow, a second connector for inputting dioxin-containing flue gas, a third connector for inputting ozone, and a fourth connector. The high-speed flowing liquid flow can fully mix with the flue gas and ozone. The fourth connector is connected to the top of the mesh cylinder.

[0006] Furthermore, the jet unit also includes a jet injector body, the suction chamber of the jet injector body is connected to the first connector, the mixing chamber of the jet injector body is connected to the second connector and the third connector respectively, and the diffuser chamber of the jet injector body is connected to the fourth connector.

[0007] Furthermore, multiple jet ejector bodies are arranged at equal intervals around the ultraviolet lamp, and any one of the jet ejector bodies and the ultraviolet lamp are arranged at equal intervals in the horizontal direction.

[0008] Furthermore, the mesh cylinder includes a mesh layer and an oxidation catalytic layer for catalyzing the oxidation of dioxins, the oxidation catalytic layer being disposed on the side of the mesh cylinder relatively close to the ultraviolet lamp.

[0009] Furthermore, the oxidation catalyst layer is a TiO2 catalyst layer.

[0010] Furthermore, the ultraviolet lamp is detachably connected to the bottom of the mesh tube, and the ultraviolet lamp is relatively watertight.

[0011] Furthermore, the bottom of the mesh cylinder is provided with a protrusion relative to the fourth connector, and the protrusion can disperse the liquid flow.

[0012] Furthermore, it also includes a tank for storing liquid, in which the mesh cylinder is submerged.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) A hazardous waste incineration flue gas treatment device of the present invention is provided with a photocatalytic component. The photocatalytic component includes a mesh cylinder for catalytic oxidation and an ultraviolet lamp. The ultraviolet lamp is located in the middle of the mesh cylinder and connected to the bottom of the mesh cylinder. The ultraviolet lamp can irradiate the inner wall of the mesh cylinder. The ultraviolet lamp can cooperate with the mesh cylinder to promote the efficient catalytic oxidation of dioxins and carry out harmless degradation.

[0014] (2) A hazardous waste incineration flue gas treatment device of the present invention is provided with a jet mixing component. The jet mixing component includes a jet unit, which includes a first connector for inputting liquid flow, a second connector for inputting dioxin-containing flue gas, a third connector for inputting ozone, and a fourth connector. Liquid flow, dioxin-containing flue gas, and ozone are input through the first connector, the second connector, and the third connector, respectively. Multiphase mixing is achieved by utilizing the turbulence effect generated by the high-speed liquid flow, so as to achieve full mixing of liquid flow, flue gas, and ozone, thereby fully utilizing the oxidizing properties of ozone. The fourth connector is connected to the top of the screen cylinder. The ozone input into the screen cylinder can be completely decomposed immediately under the action of ultraviolet light, releasing oxygen atoms with strong oxidizing properties, thereby enhancing the oxidation effect on dioxins. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the jet unit in this utility model; Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure along the AA direction; Figure 4 This is a top view of the overall structure of this utility model; Figure 5This is a schematic diagram of the photocatalytic component in this utility model; Figure 6 This is a cross-sectional schematic diagram of the mesh cylinder in this utility model; Figure 7 This is a schematic diagram of the structure of the mesh cylinder in this utility model.

[0016] In the diagram, 100 is the photocatalytic component; 110 is the mesh tube; 111 is the mesh layer; 112 is the oxidation catalytic layer; 113 is the protrusion; and 120 is the ultraviolet lamp. 200. Jet mixing assembly; 210. Jet unit; 211. First connector; 212. Second connector; 213. Third connector; 214. Fourth connector; 215. Jet injector body; 215a. Suction chamber; 215b. Mixing chamber; 215c. Diffusion chamber; 300. Box body. Detailed Implementation

[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0018] This embodiment of a hazardous waste incineration flue gas treatment device relates to the field of hazardous waste treatment technology. By using a jet mixing component 200 to fully mix high-speed liquid flow with flue gas and ozone to eliminate reaction dead zones, and by combining it with a photocatalytic component 100 to optimize dioxin oxidation reaction conditions, the device can improve the mixing uniformity of flue gas, ozone and catalyst, prolong the reaction contact time, effectively reduce the dioxin residue rate, and ensure that the emitted flue gas meets environmental protection requirements.

[0019] Please see Figures 1 to 7 This embodiment of a hazardous waste incineration flue gas treatment device includes: a photocatalytic component 100 and a jet mixing component 200. The photocatalytic component 100 includes a mesh cylinder 110 for catalytic oxidation and an ultraviolet lamp 120. The ultraviolet lamp 120 is disposed in the middle of the mesh cylinder 110 and connected to the bottom of the mesh cylinder 110. The ultraviolet lamp 120 can irradiate the inner wall of the mesh cylinder 110. The ultraviolet lamp 120 can cooperate with the mesh cylinder 110 to promote the efficient catalytic oxidation of dioxins and achieve harmless degradation.

[0020] The jet mixing assembly 200 includes a jet unit 210, which includes a first connector 211 for inputting liquid flow, a second connector 212 for inputting dioxin-containing flue gas, a third connector 213 for inputting ozone, and a fourth connector 214. Liquid flow, dioxin-containing flue gas, and ozone are input through the first connector 211, the second connector 212, and the third connector 213, respectively. Multiphase mixing is achieved by utilizing the turbulence effect generated by the high-speed liquid flow, so as to fully mix the liquid flow, flue gas, and ozone, thereby giving full play to the oxidizing properties of ozone. The fourth connector 214 is connected to the top of the mesh cylinder 110. The ozone input into the mesh cylinder 110 can be completely decomposed immediately under the action of ultraviolet light, releasing oxygen atoms with strong oxidizing properties, thereby enhancing the oxidation effect on dioxins.

[0021] In practical applications, the jet unit 210 in the jet mixing assembly 200 receives a high-speed flowing liquid through the first connector 211, dioxin-containing flue gas through the second connector 212, and ozone through the third connector 213. These three components are then thoroughly mixed within the jet injector body 215. Specifically, the high-speed flowing liquid utilizes turbulence to promote deep contact between the flue gas and ozone, resulting in a homogeneous mixture of dioxins and ozone. Thus, the dioxins are fully combined with the oxidant before entering the photocatalytic region, avoiding incomplete oxidation caused by uneven local concentrations.

[0022] The design of the fourth connector 214 connecting to the top of the mesh cylinder 110 allows the mixture to be directly introduced into the top of the photocatalytic component 100, reducing reaction interruptions or residues in the transmission path. The irradiation of the ultraviolet lamp 120 and the catalytic layer on the surface of the mesh cylinder 110 work together to oxidize dioxin molecules into harmless substances, ultimately achieving the goal of eliminating dioxin residues.

[0023] In some embodiments, please refer to Figure 2 and Figure 3 The jet unit 210 also includes an jet injector body 215. The suction chamber 215a of the jet injector body 215 is connected to the first connector 211, the mixing chamber 215b of the jet injector body 215 is connected to the second connector 212 and the third connector 213 respectively, and the diffuser chamber 215c of the jet injector body 215 is connected to the fourth connector 214. The internal structure of the jet injector body 215 is connected one-to-one with multiple corresponding connectors, systematically optimizing the mixing process of liquid flow, flue gas, and ozone. The connection between the diffuser chamber 215c of the jet injector body 215 and the fourth connector 214, along with the integration of the jet injector body 215 and the photocatalytic component 100, further enhances the overall treatment effect.

[0024] In practical implementation, the jet injector body 215 is a device that achieves multiphase fluid mixing through fluid dynamics principles. It can be implemented using a Venturi tube structure or a jet pump structure. Specifically, the suction chamber 215a is a cavity inside the jet injector body 215 used to create negative pressure to guide external fluid in. Its purpose is to generate a low-pressure zone through high-speed liquid flow, thereby actively drawing in flue gas and ozone. The mixing chamber 215b is a confined space inside the jet injector body 215 used to achieve thorough mixing of multiple fluids; its mixing efficiency can be improved by incorporating a turbulence enhancement structure. The diffuser chamber 215c is a transition region inside the jet injector body 215 used to reduce fluid velocity and stabilize pressure, its purpose being to prevent high-speed fluid from impacting downstream equipment.

[0025] The design of the intake chamber 215a being connected to the first connector 211 creates a negative pressure zone within the intake chamber 215a, actively guiding the intake path of the flue gas and ozone, thus avoiding mixing delays or uneven local concentrations caused by relying solely on external pressure. The layout of the mixing chamber 215b, connected to both the second connector 212 and the third connector 213, ensures that the liquid flow, flue gas, and ozone generate high-intensity turbulence within the mixing chamber 215b, significantly improving contact efficiency. Finally, the connection between the diffuser chamber 215c and the fourth connector 214 reduces the flow velocity and stabilizes the pressure of the mixed fluid within the diffuser chamber 215c, allowing for a smooth transition to the mesh cylinder 110 area, ensuring the continuity and stability of the photocatalytic reaction.

[0026] In some embodiments, please refer to Figure 1 and Figure 4 Multiple ejector bodies 215 are equidistantly arranged around the ultraviolet lamp 120, with each ejector body 215 and the ultraviolet lamp 120 equidistantly spaced horizontally. The multiple ejector bodies 215 are distributed in a ring around the ultraviolet lamp 120, allowing the high-speed liquid flow-driven flue gas and ozone to be simultaneously injected into the mesh cylinder 110 from multiple directions, avoiding localized mixing dead zones and forming a spatially uniform mixing flow field. Simultaneously, each ejector body 215 maintains the same horizontal distance from the ultraviolet lamp 120, ensuring consistent ultraviolet radiation intensity and preventing fluctuations in catalytic intensity due to distance differences. This arrangement of the ejectors not only enhances the complete reaction between ozone and dioxins but also strengthens the overall effect of the photocatalytic process.

[0027] In the specific implementation process, a total of six sets of jet body 215 are provided, and the included angle between two adjacent jet body 215 is 60°. The jet body 215 is the core component for realizing the mixing of flue gas, ozone and liquid flow, and it can be implemented by adopting a multi-channel jet structure or a similar mixing device.

[0028] The distribution of the ejector body 215 is achieved through a uniform annular arrangement design, ensuring the spatial uniformity of the mixing flow field. As a key component of the photocatalytic reaction, the consistent distance between the UV lamp 120 and the ejector body 215 ensures the uniform distribution of photocatalytic activity on the horizontal plane, thereby improving the efficiency of dioxin oxidation.

[0029] In some embodiments, please refer to Figure 6 The mesh cylinder 110 includes a mesh layer 111 and an oxidation catalyst layer 112 for catalyzing the oxidation of dioxins. The oxidation catalyst layer is located on the side of the mesh cylinder 110 relatively close to the ultraviolet lamp 120. The mesh layer 111 serves as a basic support structure, ensuring uniform distribution of flue gas and liquid flow during passage, thus providing a stable contact environment for the catalytic reaction. The oxidation catalyst layer 112 is precisely positioned on the side of the mesh cylinder 110 closest to the ultraviolet lamp 120. The oxidation catalyst layer 112 fully utilizes the central location of the ultraviolet lamp 120 within the mesh cylinder 110, placing the catalyst layer in the region of highest ultraviolet radiation intensity. The ultraviolet lamp 120 and the mesh cylinder 110 structure form an organic synergy, significantly improving light energy absorption efficiency and ultimately achieving complete oxidation of dioxins, reducing residual risks.

[0030] In practical implementation, the mesh layer 111 is a basic support structure with regular or irregular pore structure, which can be made of metal woven mesh, ceramic porous materials, or polymer filter mesh. Its purpose is to provide uniformly dispersed channels for flue gas and liquid flow, avoiding local flow dead zones or uneven concentration. The oxidation catalyst layer 112 is a functional coating that can absorb ultraviolet light and generate strong oxidizing substances. It can be prepared by processes such as sol-gel method, chemical vapor deposition, or electrophoretic deposition. Its purpose is to efficiently decompose dioxin molecules.

[0031] As a further embodiment, the oxidation catalyst layer 112 is a TiO2 catalyst layer. The oxidation catalyst layer 112 is a material layer used for catalyzing the oxidation of dioxins. It can be achieved by using a pure TiO2 coating, a TiO2 composite material doped with metal ions, or a supported TiO2 catalyst. The purpose of choosing TiO2 as the catalyst material is that it has excellent photocatalytic activity and chemical stability, and can continuously generate strong oxidizing substances under ultraviolet irradiation, thereby effectively decomposing the dioxin molecular structure.

[0032] When dioxin-containing flue gas passes through the mesh cylinder 110, the TiO2 catalyst layer generates electron-hole pairs under ultraviolet light excitation, thereby generating reactive oxygen species. These reactive oxygen species can deeply oxidize and decompose dioxin molecules, converting them into harmless substances. Due to the excellent response characteristics of TiO2 material to ultraviolet light, it can maintain stable catalytic performance even in complex flue gas environments, which significantly improves the dioxin removal efficiency and effectively avoids the problem of dioxin residue in flue gas.

[0033] In some embodiments, the UV lamp 120 is detachably connected to the bottom of the mesh cylinder 110, and the UV lamp 120 is relatively watertight. This detachable connection allows for quick separation of the UV lamp 120 for maintenance or replacement during device operation, avoiding the need for complete disassembly. This is particularly important in the complex flue gas environment generated by hazardous waste incineration, where the UV lamp 120 is susceptible to performance degradation due to contaminant adhesion. The detachable design simplifies routine maintenance and ensures uninterrupted photocatalytic processes. The relatively watertight design prevents liquid from seeping into the interior through a sealed structure. Considering that the mesh cylinder 110 may be immersed in liquid media (such as the liquid flow environment after jet mixing), the watertight design effectively isolates moisture from corroding electrical components, maintaining stable UV light emission and ensuring the continuous and efficient dioxin catalytic oxidation reaction. This enhances the environmental adaptability and long-term operational stability of the entire flue gas treatment system.

[0034] In practical implementation, the detachable connection between the UV lamp 120 and the bottom of the mesh cylinder 110 is achieved through a specific connection structure, enabling convenient separation and assembly. This can be achieved using a snap-fit ​​connection, a threaded connection, or a quick-release locking device, aiming to simplify maintenance and replacement operations and reduce equipment downtime. The UV lamp 120 is watertight by using sealing rings, sealant, or other waterproof structures to protect it from liquid infiltration. This is intended to protect electrical components and ensure stable UV light emission.

[0035] In some embodiments, please refer to Figure 7 The bottom of the mesh cylinder 110 is provided with a protrusion 113 positioned opposite the fourth connector 214. By providing the protrusion 113 at the bottom of the mesh cylinder 110, the liquid flow changes direction and diffuses immediately after entering the mesh cylinder 110 from the fourth connector 214. The physical structure of the protrusion 113 obstructs the falling liquid flow, transforming what might have been a concentrated liquid flow into a more uniform thin layer or fine droplets, significantly increasing the contact interface between the liquid flow and the flue gas and ozone. The dispersed liquid flow maintains the stability of the liquid flow distribution within the mesh cylinder 110, providing a more uniform reaction environment for the photocatalytic component 100, ultimately enhancing the oxidative decomposition effect of dioxins.

[0036] In practical implementation, the protrusion 113 is a physical structure that can be shaped like a cone, hemisphere, or pyramid. In actual applications, the position of the protrusion 113 needs to maintain a specific relative relationship with the fourth connector 214 to ensure that the liquid flow entering from the fourth connector 214 can be effectively intercepted and dispersed. Its purpose is to prevent the liquid flow from directly impacting the bottom of the mesh cylinder 110 and forming a concentrated flow stream through blocking and diversion effects, thereby optimizing the liquid flow distribution.

[0037] In some embodiments, please refer to Figure 1 A hazardous waste incineration flue gas treatment device also includes a tank 300 for storing liquid, in which a mesh cylinder 110 is submerged. The tank 300 creates a closed liquid environment, allowing the mesh cylinder 110 to remain continuously submerged. Because the mesh cylinder 110 is completely surrounded by liquid, the mixed liquid flow entering from the jet unit 210 can more evenly contact the catalyst layer on the surface of the mesh cylinder 110 during diffusion.

[0038] The immersion setting of the mesh cylinder 110 facilitates the formation of a stable liquid layer inside the mesh cylinder 110, avoiding insufficient contact caused by rapid liquid flow away, while maintaining the wet state of the catalyst layer. Under the irradiation of the ultraviolet lamp 120, the oxidation reaction between dioxins and ozone can proceed efficiently, thereby significantly improving the decomposition effect of dioxins and reducing the risk of residue.

[0039] In practical implementation, the housing 300 is a container structure capable of holding and storing liquids. It can be made of metal, plastic, or other materials with corrosion resistance and sealing properties, aiming to provide a stable liquid environment for the entire device. The mesh cylinder 110 is immersed in the housing 300 by completely placing the mesh cylinder 110 below the liquid surface within the housing 300, ensuring that its surface is in full contact with the liquid. The purpose is to prolong the residence time of flue gas in the catalytic zone, thereby improving the catalytic oxidation efficiency of dioxins.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the present utility model.

Claims

1. A hazardous waste incineration flue gas treatment device, characterized in that, include: A photocatalytic component, comprising a mesh tube for catalytic oxidation and an ultraviolet lamp, wherein the ultraviolet lamp is disposed in the middle of the mesh tube and connected to the bottom of the mesh tube; A jet mixing assembly includes a jet unit, which includes a first connector for inputting liquid flow, a second connector for inputting dioxin-containing flue gas, a third connector for inputting ozone, and a fourth connector. The high-speed flowing liquid flow can fully mix with the flue gas and ozone. The fourth connector is connected to the top of the mesh cylinder.

2. The hazardous waste incineration flue gas treatment device according to claim 1, characterized in that, The jet unit also includes a jet body, the suction chamber of which is connected to the first connector, the mixing chamber of which is connected to the second connector and the third connector respectively, and the diffuser chamber of which is connected to the fourth connector.

3. The hazardous waste incineration flue gas treatment device according to claim 2, characterized in that, Multiple jet ejector bodies are arranged at equal intervals around the ultraviolet lamp, and any one of the jet ejector bodies and the ultraviolet lamp are arranged at equal intervals in the horizontal direction.

4. The hazardous waste incineration flue gas treatment device according to claim 1, characterized in that, The mesh cylinder includes a mesh layer and an oxidation catalytic layer for catalyzing the oxidation of dioxins, the oxidation catalytic layer being disposed on the side of the mesh cylinder relatively close to the ultraviolet lamp.

5. The hazardous waste incineration flue gas treatment device according to claim 4, characterized in that, The oxidation catalyst layer is a TiO2 catalyst layer.

6. The hazardous waste incineration flue gas treatment device according to claim 1, characterized in that, The ultraviolet lamp is detachably connected to the bottom of the mesh tube, and the ultraviolet lamp is relatively watertight.

7. The hazardous waste incineration flue gas treatment device according to claim 1, characterized in that, The bottom of the mesh cylinder is provided with a protrusion relative to the fourth connector, and the protrusion can disperse the liquid flow.

8. The hazardous waste incineration flue gas treatment device according to claim 1, characterized in that, It also includes a tank for storing liquid, in which the mesh cylinder is submerged.

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