Improved wet oxidation tower device

Abstract

The utility model relates to the technical field of organic waste gas treatment, and discloses an improved wet oxidation tower device which comprises a catalytic oxidation tower body, an ozone oxidation system and an ozone catalytic reduction layer, a novel filler structure is arranged in the catalytic oxidation tower body, and a rare earth metal catalyst layer, a molecular sieve adsorption layer and an inclined plate guide plate layer are attached to the novel filler structure; the ozone oxidation system comprises an ozone generator, an ozone storage tank, a Roots blower, an ozone conveying pipeline, a water tank, an ozone aeration device and an oxygen-enriched circulating water pump; the ozone catalytic reduction layer is arranged at the top of the catalytic oxidation tower body, the ozone catalytic reduction layer is composed of a catalytic carrier and a catalyst loaded on the catalytic carrier, compared with a conventional waste gas wet oxidation tower, the treatment efficiency of the device is higher, and the device can be used for treating organic components (such as benzene-containing series, halogenated hydrocarbon and the like) with stable structures; the broad spectrum is stronger.

Description

Technical Field

[0001] This utility model relates to the field of organic waste gas treatment technology, and in particular to an improved wet oxidation tower device. Background Technology

[0002] With increasingly severe air pollution problems, the treatment of waste gas emissions is receiving more and more attention from the government and all sectors of society. As a major component of industrial waste gas, organic waste gas has a significant impact on the atmospheric environment and human health. At the same time, due to its complex sources and composition, a considerable portion of waste gas contains some structurally stable substances. Conventional wet oxidation towers have low or almost no treatment efficiency when dealing with these structurally stable organic components (such as benzene compounds, halogenated hydrocarbons, etc.).

[0003] The conventional wet oxidation tower solutions described above have the following problems: they are ineffective or have almost no effect on treating organic waste gases containing chemically stable substances (such as benzene compounds, halogenated hydrocarbons, etc.), lack broad applicability, and are not as efficient as the improved wet oxidation towers. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides an improved wet oxidation tower device, which has the advantage of more efficient treatment of organic waste gas and solves the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: an improved wet oxidation tower device, which is applicable to the treatment of organic waste gas, including a catalytic oxidation tower body, an ozone oxidation system and an ozone catalytic reduction layer;

[0006] The catalytic oxidation tower is equipped with an exhaust gas inlet and a new type of packing structure. The new packing structure is attached with a rare earth metal catalyst layer, a molecular sieve adsorption layer and an inclined plate guide plate layer.

[0007] The ozone oxidation system includes an ozone generator, an ozone storage tank, a Roots blower, an ozone delivery pipeline, a water tank, a water tank drain pipe, an ozone aeration device, and an oxygen-enriched circulating water pump.

[0008] The ozone catalytic reduction layer is located at the top of the catalytic oxidation tower. A demister and an exhaust gas outlet are provided above the ozone catalytic reduction layer. The ozone catalytic reduction layer consists of a catalytic carrier and a catalyst supported on the catalytic carrier.

[0009] In one embodiment of the utility model, the rare earth metal catalyst layer consists of two rare earth catalyst layers, each of which is loaded with rare earth metal active components. The upper rare earth catalyst layer is located below the atomizing nozzle at the top of the catalytic oxidation tower, and the lower rare earth catalyst layer is located below the inclined guide plate of the upper layer. The thickness of each rare earth catalyst layer is 5-25 cm.

[0010] In one embodiment of the utility model, the rare earth metal active component is cerium.

[0011] In one embodiment of the utility model, the molecular sieve adsorption layer is composed of two molecular sieve layers. The molecular sieve layers have a Y-shaped molecular sieve with a microporous structure. The upper molecular sieve is located below the upper rare earth catalyst, and the lower molecular sieve is located below the lower rare earth catalyst. The porosity of the molecular sieve layer is 40%-60%, and the average pore size is 0.5-2nm.

[0012] In one embodiment of the utility model, the inclined plate guide plate layer is composed of two inclined plate guide plates. The inclined plate guide plates are made of corrosion-resistant polypropylene (PP) material. The upper inclined plate guide plate is located at the bottom of the upper molecular sieve layer, and the lower inclined plate guide plate is located at the bottom of the lower molecular sieve layer. The angle between the inclined plate guide plate and the horizontal direction is 30°-60°.

[0013] In one embodiment of the utility model, the ozone generator is connected to the ozone storage tank, and the inlet of the Roots blower is connected to the outlet of the ozone storage tank through the ozone delivery pipeline and to the ozone aeration device at the bottom of the water tank.

[0014] In one embodiment of the utility model, a water tank drain pipe is installed on the side of the water tank, the water tank drain pipe is connected to the inlet of the oxygen-enriched circulating water pump, and the outlet of the oxygen-enriched circulating water pump is connected to the oxygen-enriched circulating water supply pipeline.

[0015] In one embodiment of the utility model, the catalyst support is a honeycomb ceramic with a porous structure, the pores are evenly distributed, and the pore diameter is 1-5 mm.

[0016] In one embodiment of the utility model, the catalyst is a rare earth metal oxide catalyst, and the catalyst loading is 5%-20% of the mass of the catalyst support.

[0017] In one embodiment of the utility model, the rare earth metal oxide catalyst is cerium dioxide.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This improved wet oxidation tower device has a higher treatment efficiency than conventional waste gas wet oxidation towers and can treat gases containing structurally stable organic components (such as benzene compounds, halogenated hydrocarbons, etc.), thus having a wider range of applications. Attached Figure Description

[0020] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0021] Figure 1This diagram shows the main structure of the improved wet oxidation tower device according to an embodiment of the present invention; Detailed Implementation

[0022] Various exemplary embodiments, features, and aspects of the present invention will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0023] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0026] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0027] Specific references Figure 1As a specific embodiment of an improved wet oxidation tower device 100 of this utility model, the improved wet oxidation tower device 100 includes: a catalytic oxidation tower body 101, an ozone oxidation system, and an ozone catalytic reduction layer 119; the catalytic oxidation tower body 101 is provided with a waste gas inlet 18 and a novel packing structure, the novel packing structure is respectively attached with a rare earth metal catalyst layer, a molecular sieve adsorption layer, and an inclined plate guide plate layer, which greatly improves the residence time and reaction area. Based on the conventional wet oxidation tower, ozone is introduced to realize a multiphase oxidation reaction between gas, liquid, and solid, and the treatment efficiency for benzene series and halogenated hydrocarbons can be increased to more than 70%, and the overall treatment efficiency is also more than 30% higher than that of conventional catalytic oxidation; the ozone oxidation system includes an ozone generator 102, an ozone storage tank 103, a Roots blower 104, an ozone delivery pipeline 105, a water tank 107, a water tank drain pipe 108, an ozone aeration device 106, and an oxygen-enriched circulating water pump 109.

[0028] The ozone catalytic reduction layer 119 is located at the top of the catalytic oxidation tower body 101. A demister layer 120 and an exhaust gas outlet 121 are provided on the upper part of the ozone catalytic reduction layer 119. The ozone catalytic reduction layer 119 is composed of a catalytic support and a catalyst supported on the catalytic support.

[0029] In this embodiment, the rare earth metal catalyst layer consists of two rare earth catalyst layers. Its main function is to promote the decomposition of H2O2 in oxygen-rich circulating water and generate a large number of hydroxyl free radicals OH·. Each rare earth catalyst layer is loaded with rare earth metal active ingredients. The upper rare earth catalyst 112 is located below the atomizing nozzle 111 at the top of the catalytic oxidation tower, and the lower rare earth catalyst 115 is located below the inclined guide plate 114 of the upper layer. The thickness of each rare earth catalyst layer is 5-25cm to ensure its stability and reliability during operation.

[0030] In this embodiment, the rare earth metal active component is cerium. The quality of the rare earth catalyst and the loading of the active component are tested to ensure that they meet the design requirements.

[0031] In this embodiment, the molecular sieve adsorption layer consists of two molecular sieve layers. After catalysis, the oxygen-enriched circulating water enters the molecular sieve layer, which is the main reaction zone for the exhaust gas. After the exhaust gas from bottom to top is adsorbed by the molecular sieve, it will be briefly adsorbed and retained in the molecular sieve pores. At the same time, the oxygen-enriched atomized leachate from top to bottom will also be adsorbed by the molecular sieve. They are fully reacted here. The improved molecular sieve layer here has a longer retention time and a more complete reaction than conventional packing materials such as Pall rings and Raschig rings. The molecular sieve layer has a Y-type molecular sieve with a microporous structure. The upper molecular sieve 113 is located below the upper rare earth catalyst 112, and the lower molecular sieve 116 is located below the lower rare earth catalyst 115. The porosity of the molecular sieve layer is 40%-60%, and the average pore size is 0.5-2nm. At the same time, the quality and integrity of the molecular sieve are checked to avoid damage or defects.

[0032] In this embodiment, the inclined plate guide plate layer consists of two layers of inclined plate guide plates. After the incompletely reacted oxygen-enriched spray liquid passes through this layer, the spray liquid is once again evenly distributed, making the downstream treatment unit more stable and effective. This is also one of the improvements to the traditional wet oxidation tower. The inclined plate guide plates are made of corrosion-resistant polypropylene (PP) material. The upper inclined plate guide plate 114 is located at the bottom of the upper molecular sieve 113, and the lower inclined plate guide plate 117 is located at the bottom of the lower molecular sieve 116. The angle between the inclined plate guide plates and the horizontal direction is 30°-60°, ensuring that the two layers of inclined plate guide plates can stably guide the gas flow during the operation of the device.

[0033] In this embodiment, the ozone generator 102 is connected to the ozone storage tank 103. The connection is made of well-sealed pipe fittings and sealing materials to ensure a tight connection and prevent ozone leakage. The ozone generator 102 produces ozone, which enters the ozone storage tank 103 for temporary storage. The ozone is then transported by the Roots blower 104 through the ozone delivery pipeline 105 to the ozone aeration device 106 at the bottom of the water tank 107. The inlet of the Roots blower 104 is connected to the ozone storage tank 103, and the outlet is connected to the ozone aeration device 106 at the bottom of the water tank 107 through the ozone delivery pipeline 105, ensuring a tight connection. The ozone delivery pipeline 104 should be made of an ozone-resistant material, such as stainless steel. The liquid in the water tank 107 is a 10% H2O2 solution. The ozone aeration device 106 ensures that the H2O2 solution and ozone are fully mixed, resulting in a gas-liquid mixture.

[0034] In this embodiment, a water tank drain pipe 108 is installed on the side of the water tank 107. The oxygen-enriched circulating water enters the oxygen-enriched circulating water pump 109 through the water tank drain pipe 108 on the side of the water tank 107, and is then sent to the oxygen-enriched circulating water supply pipeline 110 by the oxygen-enriched circulating water pump 109. The water tank drain pipe 108 is connected to the inlet of the oxygen-enriched circulating water pump 109. The connection method can be a flange connection to ensure a firm connection and good sealing. After the connection is completed, the connection is waterproofed to prevent water leakage. The outlet of the oxygen-enriched circulating water pump 109 is connected to the oxygen-enriched circulating water supply pipeline 110, also using a reliable flange connection. The oxygen-enriched circulating water supply pipeline 110 is reasonably arranged to ensure that the oxygen-enriched circulating water can be delivered to the required treatment location and meet the requirements of the device operation.

[0035] In this embodiment, the catalyst support is a honeycomb ceramic with a porous structure. The pores are evenly distributed and have a diameter of 1-5 mm. The quality and integrity of the catalyst support are inspected to avoid damage or defects that may affect the catalytic effect.

[0036] In this novel embodiment, the catalyst is a rare earth metal oxide catalyst, specifically cerium dioxide. The catalyst loading is required to be 5%-20% of the catalyst support mass. The required amount of catalyst is calculated, and a suitable loading method, such as spraying, is used to uniformly load cerium dioxide onto the catalyst support. During the loading process, loading conditions, such as temperature and time, are carefully controlled to ensure that the catalyst can firmly adhere to the catalyst support. After loading is completed, the catalyst support is dried and activated to achieve optimal catalytic performance.

[0037] like Figure 1 As shown in the diagram, the main structure of the improved wet oxidation tower of this utility model consists of a catalytic oxidation tower body, an ozone generator, an ozone storage tank, a Roots blower, an ozone delivery pipeline, an ozone aeration device, a water tank, a water tank drain pipe, an oxygen-enriched circulating water pump, an oxygen-enriched circulating water supply pipeline, an atomizing nozzle, a rare earth catalyst layer 1#, a molecular sieve layer 1#, a 14-inclined guide plate 1#, a rare earth catalyst layer 2#, a molecular sieve layer 2#, an inclined guide plate 2#, an exhaust gas inlet, an ozone catalytic reduction layer, a demisting layer, and an exhaust gas outlet. This wet oxidation tower has higher treatment efficiency and can treat substances containing structurally stable organic components (such as benzene compounds, halogenated hydrocarbons, etc.), exhibiting broader applicability.

[0038] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An improved wet oxidation column apparatus suitable for treating organic waste gas, characterized in that, The catalytic oxidation tower body, the ozone oxidation system and the ozone catalytic reduction layer are included. The waste gas inlet and the novel filler structure are arranged in the catalytic oxidation tower body, and the rare earth metal catalyst layer, the molecular sieve adsorption layer and the inclined plate flow guide plate layer are attached to the novel filler structure. The ozone oxidation system includes an ozone generator, an ozone storage tank, a Roots blower, an ozone delivery pipeline, a water tank, a water tank drain pipe, an ozone aeration device and an oxygen-enriched circulating water pump. The ozone catalytic reduction layer is arranged at the top of the catalytic oxidation tower body, and the demisting layer and the waste gas outlet are arranged at the upper part of the ozone catalytic reduction layer.

2. The improved wet oxidation column apparatus according to claim 1, wherein, The rare earth metal catalyst layer is composed of two layers of rare earth catalysts, each of which is loaded with a rare earth metal active component.

3. The improved wet oxidation column apparatus of claim 2 wherein, The rare earth metal active component is cerium.

4. The improved wet oxidation column apparatus of claim 1 wherein, The molecular sieve adsorption layer is composed of two layers of molecular sieve layers, and the molecular sieve layers are composed of Y-type molecular sieves with microporous structures.

5. The improved wet oxidation column apparatus of claim 1 wherein, The inclined plate flow guide plate layer is composed of two layers of inclined plate flow guide plates, and the inclined plate flow guide plates are made of corrosion-resistant polypropylene (PP) material.

6. The improved wet oxidation column apparatus according to any one of claims 1 to 5, characterized in that, The ozone generator is connected to the ozone storage tank, the inlet of the Roots blower is connected to the outlet of the ozone storage tank through the ozone delivery pipeline, and the ozone aeration device at the bottom of the water tank is connected.

7. The improved wet oxidation column apparatus according to any one of claims 1 to 5, wherein The water tank is provided with a water tank drain pipe on the side, the water tank drain pipe is connected to the inlet of the oxygen-enriched circulating water pump, and the outlet of the oxygen-enriched circulating water pump is connected to the oxygen-enriched circulating water supply pipeline.

8. The improved wet oxidation column apparatus according to any one of claims 1 to 5, wherein The catalytic carrier is a honeycomb-shaped ceramic with a porous structure, and the pore channels are uniformly distributed with a diameter of 1-5 mm.

9. The improved wet oxidation column apparatus according to any one of claims 1 to 5, wherein The catalyst is a rare earth metal oxide catalyst, and the catalyst loading is 5%-20% of the mass of the catalytic carrier.

10. The improved wet oxidation column apparatus of claim 9, wherein, The rare earth metal oxide catalyst is cerium dioxide.

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