Advanced oxidation solid catalyst filling structure
Through vertically arranged filler module structure and glass wire mesh bag catalyst pack, the problem of unreasonable catalyst loading in advanced oxidation technology is solved, efficient filling and uniform reaction of the catalyst are achieved, and wastewater treatment efficiency is improved.
Patent Information
- Application Number
- CN202422463627.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-12
AI Technical Summary
In the prior art, advanced oxidation technology lacks an effective solid catalyst loading method in industrial wastewater treatment, which cannot meet the requirements of regular catalyst replacement, sufficient effective sites, gas-liquid flow uniformity and mixed loading of multiple catalysts.
The vertically arranged filler module structure is adopted. Each module consists of an outer mesh frame, a net cover and an inner mesh sheet. The inner mesh sheet divides the inner mesh frame into multiple catalyst pack filling units. A mesh bag woven with glass wire is used as a catalyst pack. The modules are connected by raised fixed columns and flexible hanging lugs to achieve flexible filling and stable circulation of the catalyst.
It realizes efficient filling and unloading of catalysts, ensures the effectiveness and uniformity of the catalytic reaction, reduces operating and maintenance costs, and improves COD removal rate.
Smart Images
Figure CN223239890U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of industrial wastewater treatment, in particular to an advanced oxidation solid catalyst filling structure. Background Art
[0002] Industrial wastewater comes from a wide range of sources, including domestic water, metallurgy, chemicals, food processing, electronics, and natural gas extraction. These processes generate large quantities of wastewater, and direct discharge can cause significant harm to the water and soil environment. Advanced oxidation technology (ADT) is a commonly used and highly effective method for wastewater treatment, characterized by excellent treatment results, easily achievable reaction conditions, and minimal secondary pollution. The process often requires the use of solid catalysts, which require a rational and scientific arrangement to ensure efficient treatment. As ADT is still in its early stages of rapid development, the industry has conducted limited research on the loading / packing methods of solid catalysts, particularly in the field of industrial wastewater treatment, where it has yet to receive sufficient attention.
[0003] The use of advanced catalytic oxidation technology to treat wastewater involves a wide range of catalyst types, such as non-precious metal, rare earth, and precious metal catalysts. The catalysts also come in various shapes, such as granular and cylindrical. A solid catalyst loading method is needed that meets the requirements of multiple catalyst loading, modular loading and unloading, low air-liquid contact area, low pressure drop, reasonable liquid holdup, and high catalytic efficiency. The details are as follows:
[0004] 1) Due to hydraulic disturbance and surface flushing, solid catalysts need to be replaced or added regularly to ensure the reasonable loading of solid catalysts;
[0005] 2) The catalyst surface is the site where the catalytic reaction occurs, ensuring a sufficient number of effective sites to ensure the overall efficiency of the catalytic effect;
[0006] 3) It is necessary to ensure the passage of gas and fluid, and to ensure that the flow channel structure can prevent or avoid the lateral flow of gas and fluid, maintain the uniformity of water flow / air flow, and achieve a good match between the smallest local pressure drop and the local liquid holdup;
[0007] 4) The mixed loading of multiple solid catalysts, loading thickness, loading order, etc., require overall planning and can be effectively achieved through reasonable component layout. Utility Model Content
[0008] The purpose of the utility model is to provide an advanced oxidation solid catalyst filling structure, which can meet the aforementioned solid catalyst filling requirements in an advanced catalytic oxidation reactor and cover the catalyst filling, maintenance and updating needs.
[0009] In order to achieve the above-mentioned purpose, the specific technical solutions adopted by the present utility model are as follows:
[0010] A structure for packing an advanced oxidation solid catalyst comprises several packing modules arranged vertically and connected in sequence. Each packing module comprises an outer mesh frame, a mesh cover disposed on top of the outer mesh frame, and several inner mesh sheets disposed within the outer mesh frame. The inner mesh sheets divide the interior space of the outer mesh frame into multiple packing cells for placing catalyst packages filled with solid catalyst. In this utility model, "several" means at least two.
[0011] When the above-mentioned catalyst filling structure is used, the number of filling units used (i.e., actually filled) in each filling module can be selected according to the actual filling density requirements; the filling units in the same filling module are filled with the same catalyst material; different filling modules can use the same or different catalyst materials, and the number of filling units used can be the same or different.
[0012] Preferably, the inner mesh sheet is a corrugated metal mesh sheet, which can better isolate the catalyst package and leave more space for gas and liquid circulation.
[0013] Preferably, the catalyst bag is a mesh bag woven from glass fibers, which has high mechanical strength, good corrosion resistance, is not easily damaged during wastewater treatment, and can adapt to filling units of different shapes.
[0014] Preferably, the net cover is detachably connected to the outer net frame so as to facilitate taking and placing the catalyst package in the filling unit. The detachable connection includes but is not limited to bolt thread connection, buckle connection, lock connection and the like.
[0015] Preferably, a raised fixing column is provided on the top of the upper net cover, and a recessed docking portion is provided at a corresponding position on the bottom of the outer net frame; or, a raised fixing column is provided on the bottom of the outer net frame, and a recessed docking portion is provided at a corresponding position on the top of the upper net cover; adjacent filling modules are fixed to each other by plugging and fitting the raised fixing column and the recessed docking portion.
[0016] Furthermore, each packing module is symmetrically provided with at least two protruding fixing columns and two corresponding recessed docking portions.
[0017] Preferably, a flexible lifting lug is provided in the middle of the net cover for grabbing the filler module through a hook, which is convenient for disassembly and replacement. At the same time, the flexible design (such as using soft cloth, soft rope and other flexible materials) will not cause space obstruction to module assembly.
[0018] The utility model has the following beneficial effects:
[0019] 1. Through the setting of filling units and filler modules, combined with the use of catalyst packages, the compatibility of various catalyst materials is ensured, sufficient catalytic effective sites are ensured, and a fully stable gas-liquid flow space is formed between the catalyst packages.
[0020] 2. The rigid structural consistency of the packing module ensures the overall uniformity and stability of the packing space, thereby achieving catalytic effectiveness and high efficiency.
[0021] 3. The orderly stacking structure of the packing modules ensures the consistency of the flow channels for upward liquid and gas flow, as well as the uniformity of parallel cross-sections, thereby ensuring the consistency of the catalytic reaction in the packing space.
[0022] 4. The modular design of the filler improves the loading and unloading efficiency and reduces the operation and maintenance costs. It can also meet the requirements of different loading thicknesses and loading sequences during mixed loading of solid catalysts, and is highly flexible. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 : Schematic diagram of the advanced oxidation solid catalyst filling structure described in Example 1.
[0024] Figure 2 : Schematic diagram of the structure of the filler module described in Example 1 (the inner mesh is not drawn in the figure).
[0025] Figure 3 : Distribution diagram of the inner mesh and filling units in the outer mesh frame in the filler module described in Example 1.
[0026] Figure 4 : Distribution diagram of the inner mesh and filling units in the outer mesh frame in the filler module described in Example 2.
[0027] In the figure: 1-packing module, 2-advanced catalytic oxidation reactor; 11-external mesh frame, 12-upper mesh cover, 13-inner mesh sheet, 14-filling unit, 15-raised fixing column, 16-recessed docking part, 17-flexible lifting ear, 18-catalyst package. DETAILED DESCRIPTION
[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0029] Example 1
[0030] An advanced oxidation solid catalyst filling structure, such as Figure 1 As shown, it is loaded into the advanced catalytic oxidation reactor 2 and consists of a number of packing modules 1 arranged vertically and connected in sequence; Figure 2As shown, each packing module 1 includes an outer mesh frame 11 with an open top, a mesh cover 12 covering the top of the outer mesh frame 11, and a plurality of inner mesh sheets 13 arranged inside the outer mesh frame 11; the outer mesh frame 1 and the mesh cover 12 are both made of metal; the inner mesh sheets 13 are corrugated metal wire mesh sheets, which divide the internal space of the outer mesh frame 11 into a plurality of filling units 14 for placing catalyst packages 18. In this embodiment, the advanced catalytic oxidation reactor 2 is a cylindrical reactor, the horizontal cross-section of the packing module 1 is circular, and the inner mesh sheets 13 divide the internal space of the outer mesh frame 11 into a plurality of sector-shaped areas ( Figure 3 ), namely the filling unit 14. The catalyst bag 18 is a mesh bag woven from glass fibers and filled with solid catalyst.
[0031] More specifically, two raised fixing posts 15 are symmetrically positioned at the top and ends of the net cover 12 about its center. Within each packing module 1, a recessed docking portion 16 is provided at the same position on the bottom of the outer net frame 11. Adjacent packing modules 1 are secured to each other by interlocking the raised fixing posts 15 with the recessed docking portions 16. A flexible lifting lug 17 is provided in the middle of the net cover 12, and a hook is hooked onto the flexible lifting lug 17 to grasp the packing module 1.
[0032] The method for loading and unloading the advanced oxidation solid catalyst filling structure is as follows:
[0033] According to the filling requirements of the three-dimensional space of the reactor loading area, the catalyst type and the number of filling units 14 are selected to complete the filling of various types of filling modules 1, and the filling order is selected to load various types of filling modules 1 into the loading area of the advanced catalytic oxidation reactor 2; during the unloading operation, the filling module 1 is grabbed from the top by a hook grabbing method and moved out of the reactor.
[0034] Through the above structural design, an upward channel is provided for water flow and gas phase. When the liquid and gas flow through the surface of the catalyst package 18, they enter the interior of the catalyst package 18 through diffusion and contact with the catalyst particles to carry out catalytic reaction. The products generated by the reaction are in turn contacted with the rising gas phase and liquid phase in the catalyst package 18 through diffusion to transfer heat and mass.
[0035] The following provides specific application examples of the advanced oxidation solid catalyst filling structure of this embodiment in wastewater treatment:
[0036] Wastewater source: Wastewater after RO membrane concentration from a chemical plant (COD: 800-2200 mg / L);
[0037] Implementation method: Two granular catalysts and one columnar catalyst are selected and loaded into catalyst packages (one catalyst package 18 contains one catalyst), and the catalyst package 18 is loaded into the filling unit 14 to form three different filling modules 1; the filling module 1 filled with one granular catalyst package is loaded into the lower layer of the reactor, and then the filling module 1 filled with the columnar catalyst package is loaded into the middle layer of the reactor, and finally the filling module 1 filled with another granular catalyst is placed in the upper layer of the reactor. The volume ratios of the catalysts in the three layers are 1:6:3 respectively; the wastewater after RO membrane concentration is used as the object, and the advanced oxidation treatment is carried out. The reaction time is set to 1 to 2 hours, and its COD removal rate is recorded;
[0038] Test results: After multiple tests on wastewater with different compositions, its COD removal rate is higher than that of the traditional filler filling method (using a single catalyst, directly filling it into the reactor filling area, without module layering and unit partition filling), and its average removal rate is increased by 20%.
[0039] Example 2
[0040] An advanced oxidation solid catalyst filling structure is basically the same as that of Example 1, except that: in this embodiment, the horizontal cross section of the filling module 1 is square, such as Figure 4 As shown, the inner mesh 13 divides the inner space of the outer mesh frame 11 into a plurality of square areas. The packing module 1 is suitable for a cubic reactor.
[0041] This specific implementation method is merely an explanation of the utility model and not a limitation of the utility model. Any changes made by those skilled in the art after reading the specification of the utility model will be protected by patent law as long as they are within the scope of the claims of the utility model.
Claims
1. An advanced oxidation solid catalyst filling structure, characterized in that: The invention comprises a plurality of packing modules (1) arranged vertically and connected in sequence; each packing module (1) comprises an outer mesh frame (11), a mesh cover (12) arranged on the top of the outer mesh frame (11), and a plurality of inner mesh sheets (13) arranged inside the outer mesh frame (11); the inner mesh sheets (13) divide the inner space of the outer mesh frame (11) into a plurality of filling units (14) for placing catalyst packages (18); the catalyst packages (18) are filled with solid catalyst.
2. The advanced oxidation solid catalyst filling structure according to claim 1, characterized in that: The inner mesh sheet (13) is a corrugated metal mesh sheet.
3. The advanced oxidation solid catalyst filling structure according to claim 1, characterized in that: The catalyst bag (18) is a mesh bag woven from glass fibers.
4. The advanced oxidation solid catalyst filling structure according to claim 1, characterized in that: The net cover (12) is detachably connected to the outer net frame (11).
5. The advanced oxidation solid catalyst filling structure according to claim 1, characterized in that: The top of the net cover (12) is provided with a raised fixing column (15), and the corresponding position of the bottom of the outer net frame (11) is provided with a recessed docking portion (16); or, the bottom of the outer net frame (11) is provided with a raised fixing column (15), and the corresponding position of the top of the net cover (12) is provided with a recessed docking portion (16); adjacent filler modules (1) are fixed to each other by plugging and fitting the raised fixing column (15) and the recessed docking portion (16).
6. The advanced oxidation solid catalyst filling structure according to claim 5, characterized in that: Each filler module (1) is symmetrically provided with at least two raised fixing columns (15) and two corresponding recessed docking portions (16).
7. The advanced oxidation solid catalyst filling structure according to claim 1, characterized in that: A flexible lifting lug (17) is provided in the middle of the net cover (12).