Stacked fixed bed reactor

Abstract

This invention relates to the chemical industry, specifically disclosing a stacked fixed-bed reactor. By installing a shell-binding system between the reactor bodies of the stacked fixed-bed reactors, this system comprises multiple sets of binding units arranged at intervals around the shell-binding flange connection structure. Each binding unit includes an upper reinforcing flange, a lower reinforcing flange, and binding bolts connecting the two. This creates a stable binding structure between the upper and lower fixed-bed reactors, significantly enhancing the connection stability between the stacked reactors. As a supplementary reinforcement to the shell-binding flange connection structure, the shell-binding system, through the tightening action of the binding bolts and upper and lower locking nuts, forms a more integrated structure in the vertical direction for the stacked fixed-bed reactor, significantly improving the overall stability and safety of the reactor.

Description

Technical Field

[0001] This invention relates to fixed-bed reaction equipment in the chemical industry, specifically to a stacked fixed-bed reaction device. "Fixed bed" refers to a solid bed in the reactor, which may be a catalyst (used to accelerate chemical reactions), an adsorbent (used to adsorb specific substances), and / or solid reactants. Background Technology

[0002] Catalytic flue gas desulfurization (FGD) technology, as a known promising desulfurization technology, operates on the principle that sulfur dioxide, water, and oxygen in the flue gas are adsorbed onto a catalyst and react to form sulfuric acid under the catalytic action of active components. When the sulfuric acid adhering to the catalyst reaches a certain level, a regeneration solution (usually dilute sulfuric acid and / or water) can be used to wash the catalyst, thereby removing the adhering sulfuric acid and releasing the active sites. The used regeneration solution (usually dilute sulfuric acid) can be reused as a byproduct. Relevant references include: "Current Status and Trends of Catalytic Flue Gas Desulfurization Technology, Proceedings of the 2009 Annual Meeting of the Chinese Society for Environmental Sciences, 2009, Huang Pan et al."

[0003] When applying catalytic flue gas desulfurization technology to practical engineering projects, a specialized catalytic flue gas desulfurization tower and a desulfurization reactor installed within the tower are required. In patent document CN214764545U, the applicant provides a catalytic flue gas desulfurization device. The desulfurization reactor has an inlet, an outlet, a drain outlet, and a catalyst loading space within the reactor. The reactor is equipped with a spray device for washing and regenerating the catalyst. During desulfurization, flue gas enters the reactor through the inlet, passes through the catalyst (which is a "fixed bed"), and is then discharged from the outlet. Sulfur dioxide in the flue gas reacts on the catalyst to form sulfuric acid. During the washing and regeneration of the catalyst, the sulfuric acid enters the regenerated liquid sprayed onto the catalyst and is discharged from the drain outlet.

[0004] In its patent application with publication number CN117339384A (titled "Internal Facility Support Structure of Chemical Tower, Catalytic Flue Gas Desulfurization Device and Components", hereinafter referred to as the reference document), the applicant first proposed a modular design scheme for catalytic flue gas desulfurization equipment. This design has significant advantages such as shortening the engineering construction cycle, reducing on-site construction difficulty, and improving the stability of engineering quality. It significantly enhances the construction and ease of use of catalytic flue gas desulfurization equipment and has become an important development path for catalytic flue gas desulfurization equipment. For example, the "Skid-mounted Modular Blended Super Activated Carbon Desulfurization and Acid Production System and Method" disclosed in publication number CN119548983A belongs to a type of modular catalytic flue gas desulfurization equipment.

[0005] However, in-depth analysis of the modular design scheme for catalytic flue gas desulfurization equipment in the reference document reveals the following technical bottlenecks: First, although the prefabricated modular support unit (equivalent to a reactor shell) in the reference document solves the standardization problem, in large-scale engineering applications, the capacity of a single prefabricated modular support unit is limited by the road transport width, and it is impossible to increase the processing capacity simply by expanding the diameter. The current approach is to increase the number of prefabricated modular support units, which necessitates increasing the civil engineering foundation and connecting pipelines. This not only increases the footprint but also increases the complexity of the system and the number of potential failure points, thereby reducing the advantages of modular design. Secondly, the funnel-shaped structure of the lower baffle in the reference document, while facilitating rapid discharge of regenerated liquid from the bottom of each catalytic flue gas desulfurization unit (equivalent to a fixed-bed reactor), significantly increases the effective height of each unit. When multiple units are stacked to form a catalytic flue gas desulfurization assembly (see the diagram in the reference document, equivalent to a stacked fixed-bed reactor), the overall center of gravity of the assembly is high, and transverse shear stress is easily generated at the joints between adjacent units, posing a structural safety hazard in earthquakes or crosswinds. Thirdly, the design of the support structure (equivalent to a fixed-bed support structure) in the reference document makes machining the first and second transverse through holes on the prefabricated modular support units cumbersome. Furthermore, during the assembly of the catalytic flue gas desulfurization assembly, the first and second support beams need to be inserted into their respective first and second transverse through holes, making construction tedious. Summary of the Invention

[0006] The purpose of this invention is to provide a stacked fixed-bed reactor device that solves the technical problem of improving the connection stability between stacked fixed-bed reactors.

[0007] A stacked fixed-bed reactor apparatus includes: at least two fixed-bed reactors, whose reactor bodies are stacked together vertically by sequentially connecting them; the reactor bodies of the stacked fixed-bed reactors are connected by a set of reactor body flange connection structures; a shell tie system is provided between the reactor bodies of the stacked fixed-bed reactors on the outside of the reactor body flange connection structures; the shell tie system includes multiple sets of tie units arranged at intervals around the reactor body flange connection structures; each tie unit includes: an upper reinforcing flange fixed to the reactor body of the upper fixed-bed reactor in the stacked fixed-bed reactors; a lower reinforcing flange fixed to the reactor body of the lower fixed-bed reactor in the stacked fixed-bed reactors; and a tie screw, the upper end of which passes through the upper reinforcing flange and is connected to an upper locking nut, and the lower end of which passes through the lower reinforcing flange and is connected to a lower locking nut.

[0008] By installing a shell tying system between the reactor shells of stacked fixed-bed reactors, this system comprises multiple sets of tying units arranged at intervals around the shell docking flange connection structure. Each tying unit includes an upper reinforcing flange, a lower reinforcing flange, and a tying bolt connecting the two. This creates a stable tying structure between the upper and lower fixed-bed reactors, significantly enhancing the connection stability between the stacked reactors. As a supplementary reinforcement to the shell docking flange connection structure, the shell tying system, through the tightening action of the tying bolts and upper and lower locking nuts, forms a more integrated structure in the vertical direction for the stacked fixed-bed reactor, significantly improving the overall stability and safety of the stacked fixed-bed reactor. This provides a reliable structural solution for large-scale stacked fixed-bed reactors, including catalytic flue gas desulfurization equipment.

[0009] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Additional aspects and advantages provided by the present invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice. Attached Figure Description

[0010] Figure 1 This is an external front view of the stacked fixed-bed reactor according to an embodiment of the present invention.

[0011] Figure 2 for Figure 1 The rear view of the stacked fixed-bed reactor shown.

[0012] Figure 3 for Figure 1 The right view of the stacked fixed-bed reactor shown.

[0013] Figure 4 for Figure 1 A partial external view of the stacked fixed-bed reactor shown.

[0014] Figure 5 for Figure 1 The diagram shows the overall disassembly of the stacked fixed-bed reactor.

[0015] Figure 6 for Figure 1 The diagram shows a disassembled view of a single combined fixed-bed reactor in a stacked fixed-bed reactor unit.

[0016] Figure 7 for Figure 1 A partial view of the adjacent flap body in the stacked fixed-bed reactor shown.

[0017] Figure 8 for Figure 1 A partial view of the corrosion-resistant thermoplastic polymer welding electrode at the adjacent petal plate body in the stacked fixed bed reactor shown.

[0018] The following are labeled in the figure: stacked fixed bed reactor 10; combined fixed bed reactor 11; cylindrical flap 111; first side docking structure 111a, second side docking structure 111b, top docking structure 111c, bottom docking structure 111d, air inlet 112; exhaust port 113; liquid outlet 114; tie unit 115; upper reinforcing flange 1151; lower reinforcing flange 1152; tie screw 1153; reactor cylindrical cover plate 116; corrosion-resistant thermoplastic polymer welding rod 117. Detailed Implementation

[0019] The present invention will now be clearly and completely described in conjunction with the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly noted that:

[0020] The technical solutions and features provided in the various sections, including the following description, can be combined with each other without conflict. Furthermore, where possible, these technical solutions, features, and related combinations can be given specific technical subject matter and protected by relevant patents.

[0021] The embodiments of the present invention described below are generally only some embodiments and not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of patent protection.

[0022] The terms "comprising," "including," "having," and any variations thereof in this specification, the corresponding claims, and related sections are intended to cover non-exclusive inclusion. Other related terms and units can be reasonably interpreted based on the relevant content provided in this specification.

[0023] To address the shortcomings of the modular design scheme for catalytic flue gas desulfurization equipment in the reference documents, an improved stacked fixed-bed reactor 10 is provided below. This stacked fixed-bed reactor 10 serves as a flue gas desulfurization tower, where the fixed beds within the reactor shells of each combined fixed-bed reactor 11 are flue gas desulfurization catalyst beds. The desulfurization principle and operation of each combined fixed-bed reactor 11 are consistent with the catalytic flue gas desulfurization technology described in the background art. Furthermore, the regenerated liquid guiding structure (if mentioned) at the bottom of the reactor shell of each combined fixed-bed reactor 11 is used to discharge the flue gas desulfurization catalyst regenerated liquid.

[0024] Alternatively, these stacked fixed-bed reactors 10 are not limited to being flue gas desulfurization towers. For example, these stacked fixed-bed reactors 10 can also be used as flue gas denitrification towers, in which the fixed bed provided in the reactor shell of each combined fixed-bed reactor 11 is a flue gas denitrification catalyst bed, and the regenerated liquid guiding structure (if mentioned) at the bottom of the reactor shell of each combined fixed-bed reactor 11 is used to discharge the flue gas denitrification catalyst regenerated liquid.

[0025] Figure 1 This is an external front view of the stacked fixed-bed reactor according to an embodiment of the present invention. Figure 2 for Figure 1 The rear view of the stacked fixed-bed reactor shown. Figure 3 for Figure 1 The right view of the stacked fixed-bed reactor shown. Figure 4 for Figure 1 A partial external view of the stacked fixed-bed reactor shown. Figure 5 for Figure 1 The diagram shows the overall disassembly of the stacked fixed-bed reactor. Figure 6 for Figure 1 The diagram shows a disassembled view of a single combined fixed-bed reactor in a stacked fixed-bed reactor unit. Figure 7 for Figure 1 A partial view of the adjacent flap body in the stacked fixed-bed reactor shown. Figure 8 for Figure 1 A partial view of the corrosion-resistant thermoplastic polymer welding electrode at the adjacent petal plate body in the stacked fixed bed reactor shown.

[0026] like Figures 1 to 8As shown, the stacked fixed-bed reactor 10 of this embodiment includes at least two combined fixed-bed reactors 11, whose reactor bodies are stacked together vertically, connected in sequence. In this embodiment, the stacked fixed-bed reactor 10 specifically includes three combined fixed-bed reactors 11, arranged from top to bottom as an upper combined fixed-bed reactor 11, a middle combined fixed-bed reactor 11, and a lower combined fixed-bed reactor 11. This stacked fixed-bed reactor 10 can effectively reduce the footprint of the device and significantly shorten the construction period through modular assembly.

[0027] Each modular fixed-bed reactor 11 has a reactor shell with sidewalls assembled from multiple shell segments 111 divided circumferentially from the reactor shell. In this embodiment, each reactor shell is assembled from eight shell segments 111, each shell segment 111 having an arc-shaped body, resulting in a circular reactor shell (outer diameter approximately 8m). Viewed along the central axis of the reactor shell, the maximum width of each shell segment 111 does not exceed 4m, ensuring convenient transportation of the shell segments 111. This segmented design solves the technical problem of limited overall transportation of large-diameter reactor shells, enabling large-diameter reactor shells required for large-scale projects to be conveniently transported to the construction site using standard transport vehicles.

[0028] Of course, in other embodiments, the number of cylinder flaps 111 can be other numbers, and the flap body can also be a 90° corner plate or a straight plate, which are assembled to form a rectangular reactor cylinder to adapt to different engineering needs and spatial layouts.

[0029] The combined fixed-bed reactor 11 also has an air inlet 112, an exhaust outlet 113, and a liquid outlet 114 for the intake and exhaust of flue gas and the discharge of regenerated liquid. The air inlet 112 is located on the lower part of the side wall of the combined fixed-bed reactor 11, the exhaust outlet 113 is located on the upper part of the side wall of the combined fixed-bed reactor 11, and the liquid outlet 114 is located at the bottom of the combined fixed-bed reactor 11. This layout is conducive to the uniform distribution and flow of gas and the efficient discharge of regenerated liquid.

[0030] like Figure 6 and Figure 7As shown, each cylindrical petal plate 111 includes a petal plate body, a first side docking structure 111a, and a second side docking structure 111b. The first side docking structure 111a is disposed on the first side of the petal plate body, and the second side docking structure 111b is disposed on the second side of the petal plate body. The first side docking structure 111a of any petal plate body is adapted to dock with the second side docking structure 111b of the petal plate body of another cylindrical petal plate 111 adjacent to the first side docking structure; the second side docking structure 111b of any petal plate body is adapted to dock with the first side docking structure 111a of the petal plate body of another cylindrical petal plate 111 adjacent to the second side docking structure. This docking design allows the cylindrical petal plates 111 to be tightly joined together, forming a structurally stable and airtight integral reactor cylinder.

[0031] The first side connection structure 111a includes a first side flange of the petal plate body, on which first side bolt mounting holes are distributed; the second side connection structure 111b includes a second side flange of the petal plate body, on which second side bolt mounting holes are distributed. Adjacent first side flanges and second side flanges of the petal plate body can be engaged by petal plate lateral locking bolts passing through corresponding first and second side bolt mounting holes. The first and second side flanges of the petal plate body extend along the central axis of the reactor cylinder; this longitudinally extending flange design enhances the overall rigidity and deformation resistance of the reactor cylinder.

[0032] Each cylindrical flap 111 also includes a top docking structure 111c and a bottom docking structure 111d. The top docking structure 111c is located at the top of the flap body and is adapted to dock with the reactor shell cover plate 116 located above it; the bottom docking structure 111d is located at the bottom of the flap body and is adapted to dock with the reactor shell cover plate 116 located below it. This top and bottom docking structure design facilitates the longitudinal assembly of the reactor shell and helps to achieve a stable connection between the various combined fixed-bed reactors 11.

[0033] The top mating structure 111c includes a top flange of the petal plate body, on which top bolt mounting holes are distributed; the bottom mating structure 111d includes a bottom flange of the petal plate body, on which bottom bolt mounting holes are distributed. The top flange of the petal plate body is engaged with the reactor shell cover 116 located above it via top locking bolts passing through corresponding top bolt mounting holes and peripheral bolt mounting holes of the reactor shell cover 116. The bottom flange of the petal plate body is engaged with the reactor shell cover 116 located below it via bottom locking bolts passing through corresponding bottom bolt mounting holes and peripheral bolt mounting holes of the reactor shell cover 116. This bolt locking system ensures reliable and airtight connections while facilitating on-site assembly and maintenance.

[0034] like Figure 5 and Figure 6 As shown, in the stacked modular fixed-bed reactor 11, the bottom flange of the valve body of the upper modular fixed-bed reactor 11's valve body 111 is engaged with the reactor body cover plate 116 located below the bottom flange of the valve body, and the top flange of the valve body of the modular fixed-bed reactor 11's valve body 111 located below the reactor body cover plate 116, through valve bottom locking bolts passing through corresponding bottom bolt mounting holes, peripheral bolt mounting holes, and top bolt mounting holes of the reactor body cover plate 116. This "sandwich" connection structure greatly enhances the overall stability of the stacked device 10, effectively reduces the transverse shear stress at the joint between adjacent reactor bodies, and significantly improves the safety of the device in harsh environments.

[0035] It is worth noting that the reactor shell cover plate 116 has a flat plate structure, which can significantly reduce the height of each combined fixed bed reactor 11 compared to the funnel-shaped lower baffle structure used in the reference document. This results in a lower overall center of gravity for the stacked fixed bed reactor 10 when multiple combined fixed bed reactors 11 are stacked together to form a stacked fixed bed reactor 10.

[0036] like Figure 7 and Figure 8As shown, the valve body has a layered composite inner and outer layer material. The inner layer material is made of a corrosion-resistant thermoplastic polymer, while the outer layer material is made of fiber-reinforced composite material or steel. This composite structure design ensures both corrosion resistance within the reactor cylinder and sufficient mechanical strength, extending the equipment's service life and reducing maintenance costs. Specifically, the corrosion-resistant thermoplastic polymer can be selected from any one of polypropylene, polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl chloride, polyethylene, polyphenylene sulfide, polyamide, and chlorinated polyvinyl chloride; the fiber-reinforced composite material can be selected from any one of glass fiber reinforced composite material, carbon fiber reinforced composite material, aramid fiber reinforced composite material, and basalt fiber reinforced composite material.

[0037] An adhesive layer exists between the inner and outer layers of the flap material, employing a heat-stable structural adhesive. This adhesive can be selected from any of the following: self-modified epoxy resin, phenolic resin, silicone rubber, polyimide, or thermosetting composite resin. This adhesive layer ensures a strong bond between the inner and outer layers, preventing delamination under temperature changes and operating loads.

[0038] Preferably, the outer layer of the valve plate is made of fiber-reinforced composite material, and the inner layer is made of corrosion-resistant thermoplastic polymer. This combination significantly reduces the weight of the cylindrical valve plate 111 compared to a steel structure, greatly reducing the overall weight of the combined fixed-bed reactor 11. This simplifies transportation and installation, reduces the complexity and cost of foundation engineering, and maintains the strength of the combined fixed-bed reactor 11. In this structure, the inner corrosion-resistant thermoplastic polymer mainly provides corrosion protection, while the outer fiber-reinforced composite material mainly provides mechanical strength and structural support. This functional division of labor allows the combined fixed-bed reactor 11 to possess excellent corrosion resistance, maintain necessary mechanical strength, and significantly reduce overall weight.

[0039] More preferably, the fiber-reinforced composite material is a glass fiber reinforced composite material with vinyl ester resin or epoxy resin as the matrix. This type of material not only has high mechanical strength but also certain corrosion resistance, providing a second protective barrier when corrosion and penetration occur in the external environment, further extending the service life of the combined fixed-bed reactor 11. Especially for operating conditions that may come into contact with acidic or alkaline media, the selection of this corrosion-resistant fiber-reinforced composite material can significantly improve the overall durability of the equipment.

[0040] The inner layer material of the petal plate has corrosion-resistant thermoplastic polymer weld bevels on the corresponding first and second sides. Correspondingly, the combined fixed-bed reactor 11 also includes corrosion-resistant thermoplastic polymer welding rods 117 welded between the corresponding corrosion-resistant thermoplastic polymer weld bevels of the adjacent petal plate bodies to form a continuous corrosion-resistant thermoplastic polymer barrier. This weld bevel design solves the corrosion protection problem at the connection of the cylinder petal plates 111, ensuring a complete corrosion-resistant barrier is formed inside the reactor cylinder, preventing corrosive media from penetrating to the outer structure, and greatly extending the service life of the equipment.

[0041] like Figure 4 , Figure 5 As shown, the reactor bodies of the stacked fixed-bed reactor 11 are connected by a set of body flange connection structures (including the top flange of the aforementioned flap body, the bottom flange of the flap body, the reactor body cover plate 116, and the corresponding locking bolts). A body tying system is provided on the outside of the body flange connection structure. The body tying system includes multiple sets of tying units 115 arranged at intervals around the body flange connection structure. This body tying system, as a supplementary reinforcement to the body flange connection structure, significantly improves the overall stability of the stacked structure.

[0042] Each tie unit 115 includes an upper reinforcing flange 1151, a lower reinforcing flange 1152, and a tie rod 1153. The upper reinforcing flange 1151 is fixed to the upper reactor body of the stacked combined fixed bed reactor 11; the lower reinforcing flange 1152 is fixed to the lower reactor body of the stacked combined fixed bed reactor 11. The upper end of the tie rod 1153 passes through the upper reinforcing flange 1151 and is connected to the upper locking nut, and the lower end passes through the lower reinforcing flange 1152 and is connected to the lower locking nut. This tie unit 115 design provides preload through the tie rod 1153, forming a stable tie structure between the upper and lower combined fixed bed reactors 11, effectively solving the technical problem of insufficient connection stability between stacked combined fixed bed reactors 11.

[0043] The tie rod 1153 in the cylinder tying system is arranged parallel to the central axis of the reactor cylinder of the stacked combined fixed bed reactor 11. Both the upper reinforcing flange 1151 and the lower reinforcing flange 1152 include the following integrally connected components: a base plate, which is fitted and fixed to the outer wall of the corresponding reactor cylinder; a first side wing plate, disposed on the first side of the base plate; a second side wing plate, disposed on the second side of the base plate; and a web plate, disposed between the first and second side wing plates and intersecting the base plate, with tie rod mounting holes for the tie rod 1153. This structural design of the reinforcing flange enhances the load-bearing capacity, prevents deformation under tying stress, and ensures the long-term reliable operation of the tying system.

[0044] The aforementioned shell-binding system adopts an external design, which does not occupy the internal space of the reactor shell and does not affect the effective volume of the combined fixed-bed reactor 11 or the catalyst bed filling height, thus maximizing the processing capacity of the equipment. Secondly, the binding unit 115 can be installed after the combined fixed-bed reactor 11 is assembled, greatly simplifying the on-site construction process. Furthermore, this shell-binding system has high adaptability, allowing for flexible adjustment of the number and distribution of binding units 115 according to actual operating conditions, suitable for stacking combined fixed-bed reactors 11 of different specifications and sizes. More importantly, the design of the shell-binding system allows each binding unit 115 to independently bear the load; even if individual binding units 115 fail, the overall structural safety will not be affected, significantly improving the reliability and safety margin of the stacked fixed-bed reactor 10. This shell-binding system works in conjunction with the flat-plate reactor shell cover 116, eliminating the problem of increased stacking height caused by the traditional funnel-shaped lower baffle structure. In addition, the cylinder tying system forms a circumferential bending reinforcement structure through uniformly distributed tying units 115, which significantly improves the bending stiffness and structural strength of the entire stacked fixed bed reactor 10 under horizontal seismic force and wind load. This reinforcement effect is more obvious for large-diameter reactor cylinders, effectively preventing displacement or cracking at the stacked joints under extreme working conditions.

[0045] Through the above design, the stacked fixed-bed reactor 10 of the present invention not only solves the technical problem of limited transportation of large-diameter reactor cylinders, but also enhances the overall stability of the stacked structure through the cylinder tying system, while improving the corrosion resistance of the equipment by adopting a layered composite material structure. This makes the stacked fixed-bed reactor 10 particularly suitable for large-scale catalytic flue gas desulfurization projects, significantly improving project construction efficiency and equipment operational reliability, and providing a novel solution for the modular design and application of fixed-bed reactor equipment.

[0046] Finally, it should be noted that each combined fixed-bed reactor 11 uses the support structure design in the reference document to support the fixed bed, which is not shown in the attached drawings.

[0047] The foregoing has described the relevant content of the present invention. Those skilled in the art will be able to implement the present invention based on these descriptions. All other embodiments obtained by those skilled in the art based on the foregoing content of this specification without inventive effort should fall within the scope of the present invention.

Claims

1. A stacked fixed-bed reactor, comprising: At least two fixed-bed reactors, wherein the reactor shells of the fixed-bed reactors are stacked together in a vertical direction by being connected sequentially; Furthermore, the reactor shells of the stacked fixed-bed reactors are connected by a set of shell-connecting flanges. Its features are: Between the reactor shells of the stacked fixed-bed reactors, a shell tie system is provided on the outside of the shell docking flange connection structure; The cylinder tying system includes multiple sets of tying units arranged at intervals around the cylinder docking flange connection structure. The tie-in unit includes: The upper reinforcing flange is fixed to the upper part of the reactor body of the fixed bed reactor in the reactor body of the stacked fixed bed reactors; The lower reinforcing flange is fixed to the reactor shell of the lower fixed-bed reactor in a series of stacked fixed-bed reactors; and The tie rod has its upper end passing through the upper reinforcing flange and connected to the upper locking nut, and its lower end passing through the lower reinforcing flange and connected to the lower locking nut. The upper reinforcing flange and / or the lower reinforcing flange comprise the following components integrally connected: The base plate is attached and fixed to the outer wall of the corresponding reactor cylinder. The first side wing plate is disposed on the first side edge of the base plate. The second side wing plate is disposed on the second side edge of the base plate; A web plate is disposed between the first side wing plate and the second side wing plate and intersects with the bottom plate. The web plate has a tie rod mounting hole for threading a tie rod.

2. The stacked fixed-bed reactor as described in claim 1, characterized in that: The tie rods in the cylinder tying system are arranged parallel to the central axis of the reactor cylinders of the stacked fixed-bed reactors.

3. The stacked fixed-bed reactor as described in claim 1, characterized in that: The reactor bodies of the stacked fixed-bed reactors each have sidewalls assembled from multiple cylindrical flaps that are divided circumferentially from the reactor body. Each cylindrical valve includes: Valve plate body; The first side docking structure is disposed on the first side edge of the petal plate body; The second side docking structure is provided on the second side of the petal plate body; The first side docking structure of any petal plate body is used to be adapted and docked with the second side docking structure of the petal plate body of another cylindrical petal plate adjacent to the first side docking structure. The second side docking structure of any petal plate body is used to adapt and dock with the first side docking structure of another cylindrical petal plate body adjacent to the second side docking structure.

4. The stacked fixed-bed reactor as described in claim 3, characterized in that: The first side docking structure includes a first side flange of the petal plate body, and the first side flange of the petal plate body is provided with first side bolt mounting holes; The second side docking structure includes a second side flange of the petal plate body, and second side bolt mounting holes are distributed on the second side flange of the petal plate body; The adjacent first side flange and the second side flange of the petal plate body can be fitted together by petal plate lateral locking bolts passing through the corresponding first side bolt mounting holes and second side bolt mounting holes.

5. The stacked fixed-bed reactor as described in claim 4, characterized in that: The first side flange and the second side flange of the valve body extend along the central axis of the reactor cylinder.

6. The stacked fixed-bed reactor as described in claim 3, characterized in that: Each cylindrical valve also includes: A top flange of the valve body is provided on the top of the valve body, and top bolt mounting holes are distributed on the top flange of the valve body; A bottom flange of the valve body is provided at the bottom of the valve body, and bottom bolt mounting holes are distributed on the bottom flange of the valve body; The top flange of the petal plate body and the top plate of the reactor cylinder located above the top flange of the petal plate body are fitted together by the top locking bolts of the petal plate body that pass through the corresponding top bolt mounting holes and the peripheral bolt mounting holes of the top plate of the reactor cylinder body. The bottom flange of the petal plate body can be engaged with the reactor cylinder cover plate located below the bottom flange of the petal plate body through the bottom locking bolts of the petal plate body that pass through the corresponding bottom bolt mounting holes and the peripheral bolt mounting holes of the reactor cylinder cover plate. Between the reactor bodies of the stacked fixed-bed reactors, the bottom flange of the valve body of the upper fixed-bed reactor's reactor body valve, the reactor body cover plate located below the bottom flange of the valve body valve, and the top flange of the valve body valve of the fixed-bed reactor's reactor body valve located below the reactor body cover plate are engaged by bottom locking bolts that pass through corresponding bottom bolt mounting holes, peripheral bolt mounting holes, and top bolt mounting holes of the valve body valve.

7. The stacked fixed-bed reactor as described in claim 3, characterized in that: Viewed along the central axis of the reactor cylinder, the maximum width of each cylinder flap does not exceed 4.2m; And / or, viewed along the central axis of the reactor cylinder, the body of each cylinder petal is an arc-shaped plate, a 90° corner plate, or a straight plate; When the flap body is an arc-shaped plate, the reactor cylinder is a circular cylinder; when the flap body is a 90° corner plate or a straight plate, the reactor cylinder is a rectangular cylinder.

8. The stacked fixed-bed reactor as described in claim 3, characterized in that: Each valve body has a layered composite inner valve material and an outer valve material, wherein the inner valve material is a corrosion-resistant thermoplastic polymer.

9. The stacked fixed-bed reactor as described in claim 8, characterized in that: The inner layer material of the petal plate is provided with corrosion-resistant thermoplastic polymer weld bevels corresponding to the first and second sides; each fixed bed reactor also includes corrosion-resistant thermoplastic polymer welding rods welded between the corresponding corrosion-resistant thermoplastic polymer weld bevels of the adjacent petal plate bodies to form a continuous corrosion-resistant thermoplastic polymer barrier.

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