A modular partitioned mesh catalyst bed structure and its filling method

Abstract

The present invention relates to the technical field of catalyst beds for monocomponent thrust chambers, and in particular to a modular partitioned mesh catalyst bed structure and a loading method thereof, wherein the modular partitioned mesh catalyst bed structure comprises: a bed carrier, a plurality of partitioned baffles and a mesh cover; the partitioned baffles are located inside the bed carrier, the plurality of partitioned baffles form a loading cavity, the loading cavity is used to load the catalyst, the mesh cover is connected to the upper surface of the bed carrier, and the bed carrier, the partitioned baffles and the mesh cover are all hollow structures. The present invention provides a catalyst bed structure and a loading scheme, through which the catalyst bed structure replaces the traditional manual loading method of "knocking, pressing, and listening", and the catalyst is loaded in a higher quality and efficient manner to form a modular catalyst bed to meet the requirements for mass production of monocomponent thrust chambers. At the same time, this structure also innovatively solves the stability of monocomponent thrust chambers of hundreds of Newtons and thousands of Newtons during long-term and repeated startup work, significantly improving the working reliability of large-thrust monocomponent thrust chambers.

Description

Technical Field

[0001] The invention relates to the technical field of catalyst beds for single-component thrust chambers, and in particular to a modular partitioned mesh catalyst bed structure and a filling method thereof. Background Art

[0002] Monopropellant liquid rocket engines rapidly catalytically decompose propellants and catalysts into high-temperature mixed gases, which then expand through the nozzle to generate thrust. During the startup and operation of the decomposition chamber of the thrust chamber, the granular catalyst inside is subjected to high temperature, high pressure and local violent explosive decomposition heat. If the catalyst is not packed tightly enough, the catalyst bed is prone to loosening and cavitation, which in turn leads to pressure peaks and pressure oscillations in the thrust chamber. Therefore, the filling quality of the catalyst has a great impact on the performance and structural reliability of the thrust chamber.

[0003] The traditional cylindrical cavity filling structure has the following disadvantages in terms of catalyst filling efficiency and working stability:

[0004] Efficiency: Most catalyst particles are small spherical or cylindrical particles. In order to ensure the quality of the catalyst when loading, there must be no gaps between the catalyst particles and they must be tightly connected. This requires compacting the catalyst through tooling and external force. Mechanical forced extrusion can easily lead to catalyst damage. Once the catalyst is damaged, it will seriously affect the engine's performance and life. Therefore, the traditional manual loading of catalysts is to place the thrust chamber on a specific tooling so that the thrust chamber can be fixed flat on the table, and then place the partition on the rear bed of the thrust chamber. The weighed catalyst is loaded layer by layer, and the outer wall of the thrust chamber or the tooling that compacts the catalyst is continuously knocked to make the catalyst loaded tightly. This loading method can only be carried out by experienced and skilled workers who weigh, load and knock and compact one by one to ensure product quality.

[0005] The first problem with manual loading is low efficiency. Since the catalyst is easy to absorb moisture and oxidize, it has high requirements for the loading environment, so the low efficiency leads to a significant increase in costs. Secondly, manual loading of catalysts has high requirements for loading personnel. Loading personnel need to have rich experience to judge whether the loading quality is up to standard, which leads to uneven loading quality by different personnel. The production efficiency of this loading method is heavily dependent on the experience and technical level of the workers, and it is difficult to adapt to the low-cost, high-efficiency and large-scale product production model of commercial aerospace.

[0006] In terms of stability: taking the double-layer catalyst bed structure as an example, the catalyst bed is divided into a front bed and a rear bed. The traditional structure is to place different partitions on the front bed and the rear bed respectively to achieve the function of isolating and supporting the catalyst. Since the partitions work in a harsh environment when the thrust chamber is started, the partitions will be skewed due to thermal deformation or the catalyst will be broken and produce holes before and after the test run, resulting in pressure spikes and rough decomposition of the propellant during the operation of the thrust chamber, resulting in a decrease in the working stability of the thrust chamber. Summary of the invention

[0007] The object of the present invention is to overcome the deficiencies of the prior art and to provide a modular partitioned mesh catalyst bed structure and a filling method thereof.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] In the first aspect, the present embodiment provides a modular partitioned mesh catalyst bed structure, comprising: a bed carrier, a plurality of partition partitions and a mesh cover; a plurality of the partition partitions are located inside the bed carrier, a plurality of the partition partitions form a filling cavity, the filling cavity is used to load the catalyst, the mesh cover is connected to the upper surface of the bed carrier, and the bed carrier, partition partitions and mesh cover are all hollow structures.

[0010] A further technical solution is that a plurality of partition plates and the bed carrier are an integrally formed structure.

[0011] A further technical solution is: the hollow structure is formed by combining a plurality of hollow holes.

[0012] A further technical solution is that the hollow hole is hexagonal, circular or diamond-shaped.

[0013] A further technical solution is that the diameter of the hollow hole is smaller than the diameter of the catalyst particle.

[0014] A further technical solution is as follows: the bed carrier is cylindrical.

[0015] A further technical solution is that a plurality of partition plates are distributed in a circumferential manner inside the bed carrier.

[0016] A further technical solution is that a plurality of partition plates are distributed inside the bed carrier in two horizontal and two vertical directions.

[0017] A further technical solution is that the mesh cover is fixed to the upper surface of the bed carrier by spot welding.

[0018] In a second aspect, this embodiment provides a method for loading a modular partitioned mesh catalyst bed structure, comprising the following steps:

[0019] The catalyst is weighed quantitatively and then loaded into the bed support in batches;

[0020] The loaded bed carrier is placed flat on a vibration table for vibration;

[0021] The bed carrier after vibration is inspected; if the inspection is qualified, the filling cavity on the bed carrier is flattened and closed with a mesh cover, and then fixed by spot welding to obtain a filled catalyst bed;

[0022] The loaded catalyst bed is dried, vacuum-sealed and completed to obtain a modular partitioned mesh catalyst bed.

[0023] Compared with the prior art, the beneficial effects of the present invention are: providing a modular partitioned mesh catalyst bed structure and a loading scheme, through which the catalyst bed structure replaces the traditional manual "knocking, pressing, and listening" loading method, and the catalyst is loaded in a higher quality and efficient manner to form a modular catalyst bed to meet the requirements for mass production of single-component thrust chambers. At the same time, this structure also ensures that the catalyst bed of medium and large thrust-level single-component thrust chambers can work stably for a long time and repeatedly start up, thereby improving the reliability of the thrust chamber operation.

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 A schematic diagram of a modular partitioned mesh catalyst bed structure provided by the present invention;

[0027] Figure 2 A schematic diagram of a hollow structure provided by the present invention;

[0028] Figure 3 Schematic diagram of the distribution of several partition partitions provided by the present invention Figure 1 ;

[0029] Figure 4 Schematic diagram of the distribution of several partition partitions provided by the present invention Figure 2 ;

[0030] Figure 5 A schematic flow chart of a method for loading a modular partitioned mesh catalyst bed structure provided by the present invention;

[0031] Figure 6Schematic diagram of the application scenario of the method for loading the modular partitioned mesh catalyst bed structure provided by the present invention Figure 1 ;

[0032] Figure 7 Schematic diagram of the application scenario of the method for loading the modular partitioned mesh catalyst bed structure provided by the present invention Figure 2 . DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0040] like Figures 1 to 4 As shown, the present invention discloses a specific embodiment of a modular partitioned mesh catalyst bed structure, comprising: a bed carrier 10, a plurality of partition partitions 20 and a mesh cover 30; a plurality of the partition partitions 20 are located inside the bed carrier 10, a plurality of the partition partitions 20 form a filling cavity 40, the filling cavity 40 is used to fill the catalyst, the mesh cover 30 is connected to the upper surface of the bed carrier 10, and the bed carrier 10, the partition partitions 20 and the mesh cover 30 are all hollow structures 50.

[0041] Specifically, a plurality of partition partitions 20 are located inside the bed carrier 10, and a filling cavity 40 is formed by the partition partitions 20. The filling cavity 40 is used to load the catalyst. By providing a modular partitioned mesh catalyst bed structure and a filling scheme, this filling scheme replaces the traditional manual "knocking, pressing, and listening" filling method, and fills the catalyst in a higher quality and efficient manner to form a modular catalyst bed to meet the requirements for mass production of single-component thrust chambers. At the same time, this structure also ensures the stability of the catalyst bed of medium and large thrust-level single-component thrust chambers during long-term and repeated startup, thereby improving the reliability of the thrust chamber operation.

[0042] like Figure 1 to Figure 2 As shown, some of the partition plates 20 and the bed carrier 10 are an integrally formed structure.

[0043] Specifically, in this embodiment, several partition baffles 20 and the bed carrier 10 are 3D printed one-piece molding structures, forming an integrated partition baffle catalyst bed structure, integrating the traditional catalyst bed and baffle, and setting partition baffles inside the catalyst bed, and all wall surfaces are three-dimensional porous hollow structures. This structure is fully 3D printed and one-piece, and then the catalyst is loaded by mechanical vibration to form a modular independent loading scheme for catalyst loading. The minimum wall thickness that can be formed by the 3D printing process is currently 0.1mm, and the minimum aperture is 0.3mm. The selection of the hollow aperture can be designed according to the catalyst particle diameter to adapt to different application scenarios.

[0044] Specifically, the integrated partition partition design has a more obvious effect on the working stability as the thrust of the thrust chamber increases. It has a significant effect on the working stability of the thrust chamber with a thrust of 100 Newtons, and has more practical engineering significance in improving the working stability of the thrust chamber with a thrust of 1,000 Newtons. This integrated structure has strong applicability, combined with the simple 3D printing production process and reliable supply. For single-component thrust chambers of different sizes and thrusts, it only needs to adjust the size of the printed structure according to the decomposition chamber of the thrust chamber to be applicable; it is applicable to thrust chambers with currently commonly used catalyst bed structures, such as single-layer catalyst beds and double-layer catalyst beds.

[0045] Specifically, the flow intensity of each partition is the same, the intersection position of each partition is greater than or equal to the catalyst particle size, and the number of partitions and the area of ​​the partition are selected through experiments to maximize the catalyst packing density.

[0046] like Figure 1 to Figure 2 As shown, the hollow structure 50 is formed by combining a plurality of hollow holes 51 .

[0047] Specifically, the hollow structure 50 is formed by combining a plurality of hollow holes 51, and has the technical effects of high connection strength, light weight and good permeability.

[0048] like Figures 1 to 4 As shown, the hollow hole 51 is hexagonal, circular or diamond-shaped.

[0049] Specifically, in this embodiment, the hollow hole 51 is preferably hexagonal in shape. This structure has high connection strength, light weight, and good permeability, and is lightweight in design while ensuring strength.

[0050] In other embodiments, the hollow hole 51 can also be circular or diamond-shaped, etc., so as to meet the printing equipment and printing technology of different 3D manufacturers, so that production is not restricted by equipment and technology, and it is also applicable to catalysts with different structural shapes.

[0051] In this embodiment, the diameter of the hollow hole 51 is smaller than the diameter of the catalyst particle.

[0052] Specifically, the diameter of the hollow hole 51 is smaller than the diameter of the catalyst particles, so as to isolate and support the catalyst while preventing the catalyst from entering the nozzle.

[0053] Among them, in this embodiment, the bed carrier 10 is cylindrical, with high strength and good filling effect.

[0054] like Figure 3 As shown, a plurality of partition plates 20 are distributed inside the bed carrier 10 in a circumferential manner.

[0055] like Figure 4 As shown, a plurality of partition plates 20 are distributed inside the bed carrier 10 in two horizontal and two vertical directions.

[0056] Specifically, the partition partitions 20 are distributed in a variety of ways. The principle of partition partitioning is to ensure that the flow intensity deviation of each partition (i.e., the loading chamber 40) is no more than ±5%, so as to ensure that the propellant can be evenly and fully decomposed in the decomposition chamber. On this basis, in order to adapt to thrust chambers of different structural sizes, a variety of partition arrangements can be used, such as three diameters in one week, six diameters in one week, three diameters in two weeks, six diameters in two weeks, two horizontal and two vertical, three horizontal and three vertical, etc., which can ensure the structural strength of the thrust chamber while playing the role of isolating and stabilizing the catalyst in different zones, thereby effectively ensuring the stability of the thrust chamber operation.

[0057] Specifically, the design principles of partition partitions are as follows:

[0058] 1. Ensure bed flow resistance. Since liquid propellant will produce wall effect of wall flow during the flow process, the wall effect will directly affect the bed flow resistance of the catalyst. Bed flow resistance is directly related to the working stability of the thrust chamber. Therefore, when partitioning with partitions, the influence on bed flow resistance should be minimized as much as possible. Too many partitions will increase the influence of wall effect and reduce bed flow resistance, resulting in instability in the operation of the thrust chamber and increased chamber pressure roughness. At the same time, increased bed flow resistance will lead to increased catalyst loss and shortened engine life. Therefore, the principle of partitioning for engines with long working life is to appropriately reduce the bed flow resistance of the catalyst bed. When partitioning, the flow area of ​​each zone should be appropriately increased to appropriately reduce the bed flow resistance. At the same time, the hollow partition can also reduce the influence of wall effect to a certain extent.

[0059] 2. Ensure that the flow intensity of each partition is the same, and the flow intensity deviation of each partition is no more than 5%, so as to ensure that the propellant can be evenly and fully decomposed in the decomposition chamber. The intersection position of each partition is greater than or equal to the catalyst particle size. For the catalyst bed loaded with catalyst particles of different mesh sizes, the number and area of ​​the partitions should be selected through experiments to maximize the catalyst packing density;

[0060] 3. Ensure structural strength. The working environment of the thrust chamber is very harsh when it is started and works for a long time. Thermal deformation or ablation will occur before and after the test run. Since the partition partition is a hollow structure, the strength of the catalyst bed structure should be guaranteed to meet the requirements during partitioning to improve the impact resistance of the thrust chamber.

[0061] Specifically, in this embodiment, the mesh cover 30 is fixed to the upper surface of the bed carrier 10 by spot welding, which increases the overall structural strength of the catalyst bed while ensuring that the catalysts in each zone are compacted.

[0062] The modular partitioned mesh catalyst bed structure is an independent modular catalyst bed structure, which simplifies the complexity of catalyst loading in the thrust chamber state and improves efficiency; the thrust chamber production unit provides a modular porous mesh structure catalyst bed, and the catalyst research and development unit performs modular catalyst loading and packaging; the weighed catalyst is manually loaded and the loading port of this structure is sealed and fixed by a tool, and then the batch is placed flat on a vibration platform and slowly vibrated for a certain period of time, and then the tool is opened one by one to check the catalyst loading quality. For local areas with poor loading quality, repair measures can be taken to ensure the loading quality. After the inspection is completed, the loading port is sealed with a partition net, spot welded and fixed, and then dried, vacuumed and sealed. When loading the thrust chamber, it only needs to open the seal and place this structure directly on the thrust chamber body to connect the thrust chamber head. Compared with traditional manual loading, this structure does not require high loading personnel. The independent modular catalyst bed structure can simplify the traditional process flow, save manpower and material resources, and also meet the requirements of high efficiency, high quality and large-scale production.

[0063] The modular partitioned mesh catalyst bed structure is a mesh hollow partition structure, which enhances the working stability of the thrust chamber. The single-component thrust chamber has the characteristic of multiple starts. When the thrust chamber is started, the catalyst is subjected to hydraulic, aerodynamic, thermal shock, pressure peak and other impacts. In such a harsh environment, it is easy to cause the catalyst particles to be squeezed, rubbed and damaged. After the damage, the powder enters the nozzle and is blown away, causing large cavities in the catalyst bed and liquid accumulation. The multiple starts of the engine and the influence of airflow will cause the cavities to move and gather, and the phenomenon of cavitation liquid accumulation will be aggravated, resulting in uneven catalysis and even explosive decomposition. The thrust chamber will also produce "panting" pressure shocks, thereby shortening the life of the engine or even losing its working ability. In order to make the thrust chamber work stably, a hollow partition partition is set inside the bed to isolate the catalyst in partitions, which not only blocks the movement of cavities in the catalyst bed, but also makes the propellant evenly distributed in the catalyst bed, thereby avoiding uneven catalysis or explosive decomposition caused by cavitation accumulation.

[0064] When the thrust chamber is started or working for a long time, due to the harsh working environment of the partition, the traditional structure is prone to thermal deformation of the partition or skewness due to catalyst loss, causing the partition to lose its isolation function. The modular partitioned mesh catalyst bed structure can further strengthen and fix the strength of the bottom partition and side walls. At the same time, it can also avoid deformation caused by the impact of the thrust chamber on the bottom plate due to long-term operation or skewness due to catalyst loss, so that the partition of the thrust chamber can always be in the best working state during operation, ensuring the stability of the thrust chamber from a structural aspect.

[0065] like Figure 5 As shown, the present invention also discloses a method for loading a modular partitioned mesh catalyst bed structure, comprising the following steps:

[0066] S1, by quantitatively weighing the catalyst, and then loading it into the bed support in batches;

[0067] Specifically, the catalyst is quantitatively weighed according to the size and volume of the bed carrier, and then the catalyst is loaded into the bed carrier in batches.

[0068] S2, placing the loaded bed carrier flat on a vibration table for vibration;

[0069] Specifically, the loaded bed carrier is fixed by a tool and then placed flat on a vibration table for vibration, so that mechanical vibration replaces manual knocking, so as to achieve high-quality and efficient loading of the catalyst.

[0070] S3, inspecting the bed carrier after vibration; if the inspection is qualified, flattening and sealing the filling cavity on the bed carrier with a mesh cover, and then fixing it by spot welding to obtain a filled catalyst bed;

[0071] Specifically, after a certain period of vibration, the tooling is opened one by one to check the catalyst filling quality in the bed carrier after vibration. If the filling is flat, it is considered to be qualified; if the filling is uneven, it is considered to be unqualified, and remedial measures must be taken for the local areas with poor filling quality to ensure the filling quality.

[0072] S4, drying the loaded catalyst bed, evacuating and sealing the loaded catalyst bed to complete the loading, so as to obtain a modular partitioned mesh catalyst bed.

[0073] Specifically, several loaded catalyst beds are dried, vacuum-sealed and completed to obtain different numbers of modular partitioned mesh catalyst beds.

[0074] like Figure 6 and Figure 7As shown, after step S4, it also includes: when connecting with the thrust chamber, only the seal of the modular partitioned mesh catalyst bed needs to be opened, and the catalyst bed modules containing catalyst particles of different sizes are placed in the front bed and the rear bed of the decomposition chamber 60 respectively, the modular catalyst bed and the decomposition chamber 60 are clearance-fitted, the catalyst particles placed in the front bed are fine particles, and the catalyst particles placed in the rear bed are coarse particles, and the front bed and the rear bed are placed in a stacked manner; then the thrust chamber head 80 is aligned with the thrust chamber body 70, and they are welded and fixed to complete the loading of the thrust chamber.

[0075] Specifically, the upper surface of the catalyst bed placed on the front bed is flush with the upper surface of the decomposition chamber 60 without leaving any gap, so as to achieve a better catalytic effect.

[0076] Specifically, the catalyst is loaded and sealed using the above method, which optimizes the production process and saves a lot of manpower and material resources. The catalyst research and development unit can perform modular loading and packaging according to the catalyst bed structure provided by the thrust chamber design unit, and the thrust chamber assembly unit can directly use the modular catalyst bed structure for loading. This solves the problem that commercial aerospace cannot produce in large quantities due to the lack of a low-humidity and high-cleanliness loading environment and skilled technical workers. It reduces the production cost of the thrust chamber and meets the current commercial aerospace demand for low-cost and efficient mass production of thrust chambers.

[0077] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A method for loading a modular partitioned mesh catalyst bed structure, applied to a modular partitioned mesh catalyst bed structure, characterized in that: The following steps are involved: The catalyst is weighed quantitatively and then loaded into the bed support in batches; The loaded bed carrier is placed flat on a vibration table for vibration; The bed carrier after vibration is inspected; if the inspection is qualified, the filling cavity on the bed carrier is flattened and closed with a mesh cover, and then fixed by spot welding to obtain a filled catalyst bed; The loaded catalyst bed is dried, vacuum-sealed and completed to obtain a modular partitioned mesh catalyst bed.

2. A method for loading a modular partitioned mesh catalyst bed structure according to claim 1, characterized in that: The modular partitioned mesh catalyst bed structure includes: a bed carrier, a plurality of partition partitions and a mesh cover; the plurality of partition partitions are located inside the bed carrier, the plurality of partition partitions form a filling cavity, the filling cavity is used to fill the catalyst, the mesh cover is connected to the upper surface of the bed carrier, and the bed carrier, partition partitions and mesh cover are all hollow structures.

3. A method for loading a modular partitioned mesh catalyst bed structure according to claim 2, characterized in that: Several of the partition plates and the bed carrier are integrally formed structures.

4. The method for loading a modular partitioned mesh catalyst bed structure according to claim 2, characterized in that: The hollow structure is formed by combining a plurality of hollow holes.

5. A method for loading a modular partitioned mesh catalyst bed structure according to claim 4, characterized in that: The hollow holes are hexagonal, circular or diamond-shaped.

6. A method for loading a modular partitioned mesh catalyst bed structure according to claim 4, characterized in that: The diameter of the hollow hole is smaller than the diameter of the catalyst particle.

7. A method for loading a modular partitioned mesh catalyst bed structure according to claim 2, characterized in that: The bed carrier is cylindrical.

8. The method for loading a modular partitioned mesh catalyst bed structure according to claim 2, characterized in that: A plurality of partition plates are distributed inside the bed carrier in a circumferential manner.

9. The method for loading a modular partitioned mesh catalyst bed structure according to claim 2, characterized in that: A plurality of partition plates are distributed inside the bed carrier in two horizontal and two vertical directions.

10. The method for loading a modular partitioned mesh catalyst bed structure according to claim 2, characterized in that: The mesh cover is fixed to the upper surface of the bed carrier by spot welding.

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