Stacked fixed bed reaction device

Abstract

The invention relates to the field of chemical engineering, and particularly discloses a stacked fixed bed reaction device. A cylinder body tying system is arranged between reactor cylinders of the stacked fixed bed reactors, the cylinder body tying system comprises a plurality of groups of tying units which are arranged around a cylinder butt flange connecting structure at intervals, and each group of tying unit comprises an upper reinforced stress flange, a lower reinforced stress flange and a tying screw rod for connecting the upper reinforced stress flange and the lower reinforced stress flange; a stable pulling structure is formed between the upper fixed bed reactor and the lower fixed bed reactor, so that the connection stability between the stacked fixed bed reactors is greatly enhanced; the barrel body tying system is used as a supplementary reinforcing measure for a barrel body butt joint flange connecting structure, and the stacked fixed bed reaction device forms a structure with higher integrity in the vertical direction through the fastening effect of the tying screw rod, the upper locking nut and the lower locking nut; and the overall stability and safety of the stacked fixed bed reaction device are obviously improved.

Description

Technical Field

[0001] The present invention relates to fixed-bed reactor equipment in the chemical industry, and more specifically, to a stacked fixed-bed reactor. A "fixed bed" refers to the solid bed layer within a reactor, which can be a catalyst (for accelerating chemical reactions), an adsorbent (for adsorbing specific substances), and / or solid reactants. Background Art

[0002] Catalytic flue gas desulfurization (FGD) is a well-known and promising desulfurization technology. Its basic principle is that sulfur dioxide, water, and oxygen in the flue gas are adsorbed on a catalyst and react under the catalytic action of active components to produce sulfuric acid. When the sulfuric acid attached to the catalyst reaches a certain level, the catalyst is washed with a regeneration liquid (usually dilute sulfuric acid and / or water) to remove the sulfuric acid and release the catalytic active sites. The regeneration liquid can be reused as a byproduct (usually dilute sulfuric acid). Related references include: "Current Status and Trends of Catalytic Flue Gas Desulfurization Technology, Proceedings of the 2009 Annual Conference of the Chinese Society of Environmental Sciences, 2009, Huang Pan et al."

[0003] The application of catalytic flue gas desulfurization technology in actual projects requires a specialized catalytic flue gas desulfurization tower and a desulfurization reactor installed within the catalytic flue gas desulfurization tower. The applicant of this application, in patent document publication number CN214764545U, provides a catalytic flue gas desulfurization device, wherein the desulfurization reactor has an air inlet, an exhaust port, a liquid discharge port, and a catalyst loading space within the desulfurization reactor. The desulfurization reactor is provided with a spray device for regeneration liquid for washing and regenerating the catalyst. During desulfurization, flue gas enters the desulfurization reactor from the air inlet, passes through the catalyst (the catalyst is a "fixed bed") for desulfurization, and is then discharged from the exhaust port. As the flue gas passes through the catalyst, sulfur dioxide reacts on the catalyst to form sulfuric acid. During the washing and regeneration of the catalyst, the sulfuric acid enters the regeneration liquid sprayed on the catalyst and is discharged from the liquid discharge port.

[0004] In patent document CN117339384A (entitled "Chemical Tower Internal Facility Support Structure, Catalytic Flue Gas Desulfurization Device, and Components," hereinafter referred to as the reference document), the applicant of this application first proposed a modular design scheme for catalytic flue gas desulfurization equipment. This scheme significantly shortens the construction period, reduces on-site construction difficulty, and improves the stability of project quality. It significantly enhances the ease of construction and use of catalytic flue gas desulfurization equipment and has become a key development direction 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 patent document CN119548983A is a type of modular catalytic flue gas desulfurization equipment.

[0005] However, an in-depth analysis of the modular design scheme for catalytic flue gas desulfurization equipment in the reference document revealed that the following technical bottlenecks still exist: First, although the prefabricated modular support unit (equivalent to a reactor cylinder) in the reference document solves the standardization problem, in large-scale engineering applications, a single prefabricated modular support unit is limited by the width of road transportation and cannot be increased by simply expanding the diameter to improve the processing capacity. The current idea is to increase the number of prefabricated modular support units, so it is necessary to increase the civil foundation and connecting pipelines, which not only increases the floor area, but also increases the complexity and failure points of the system, thereby reducing the advantages of modular design. Secondly, the funnel-shaped structure of the lower baffle in the reference document facilitates the rapid discharge of regenerated liquid from the bottom of each catalytic FGD unit (equivalent to a fixed-bed reactor). However, this structure significantly increases the effective height of each catalytic FGD unit. When multiple catalytic FGD units are stacked to form a catalytic FGD assembly (see the figure in the reference document, equivalent to a stacked fixed-bed reactor), the overall center of gravity of the catalytic FGD assembly is relatively high, and transverse shear stress is easily generated at the joints between adjacent catalytic FGD units, posing a structural safety hazard in earthquakes and crosswind environments. Thirdly, the structural design of the support structure (equivalent to the fixed-bed support structure) in the reference document makes it difficult to fabricate the first and second transverse through holes in the prefabricated modular support units. Furthermore, during assembly of the catalytic FGD assembly, the first and second support beams need to be inserted into the corresponding first and second transverse through holes, respectively, resulting in cumbersome construction. Summary of the Invention

[0006] The object of the present invention is to provide the following stacked fixed bed reactor to solve the technical problem of enhancing the connection stability between stacked fixed bed reactors.

[0007] A stacked fixed bed reaction device comprises: at least two fixed bed reactors, the reactor cylinders of these fixed bed reactors are stacked together by being butted in sequence in the vertical direction; and the reactor cylinders of the stacked fixed bed reactors are butted together by a group of cylinder butt flange connection structures; a cylinder body tie system is provided between the reactor cylinders of the stacked fixed bed reactors on the outside of the cylinder butt flange connection structure; the cylinder body tie system comprises a plurality of tie units arranged at intervals around the cylinder butt flange connection structure; the tie unit comprises: an upper reinforcing stress-bearing flange fixed on the cylinder body of the reactor cylinder of the fixed bed reactor located above among the reactor cylinders of the stacked fixed bed reactors; a lower reinforcing stress-bearing flange fixed on the cylinder body of the reactor cylinder of the fixed bed reactor located below among the reactor cylinders of the stacked fixed bed reactors; and a tie screw, the upper end of which passes through the upper reinforcing stress-bearing flange and is connected to an upper locking nut, and the lower end of which passes through the lower reinforcing stress-bearing flange and is connected to a lower locking nut.

[0008] By arranging a barrel tie system between the reactor barrels of the stacked fixed bed reactors, the barrel tie system includes a plurality of groups of tie units arranged at intervals around the barrel docking flange connection structure, and each group of tie units includes an upper reinforcing stress-bearing flange, a lower reinforcing stress-bearing flange and a tie screw connecting the two, so that a stable tie structure is formed between the upper and lower fixed bed reactors, which greatly enhances the connection stability between the stacked fixed bed reactors; the barrel tie system serves as a supplementary reinforcement measure for the barrel docking flange connection structure. Through the tightening action of the tie screw and the upper locking nut and the lower locking nut, the stacked fixed bed reaction device forms a more integrated structure in the vertical direction, which significantly improves the overall stability and safety of the stacked fixed bed reaction device, and provides a reliable structural solution for large-scale stacked fixed bed reaction devices 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 partially given in the following description, partially become apparent from the following description, or be learned through practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is an external front view of a 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 reaction device is shown.

[0012] Figure 3 for Figure 1 The right side view of the stacked fixed bed reaction device is shown.

[0013] Figure 4 for Figure 1 The external partial view of the stacked fixed bed reaction device is shown.

[0014] Figure 5 for Figure 1 The overall disassembly diagram of the stacked fixed bed reaction device is shown.

[0015] Figure 6 for Figure 1 The disassembly diagram of a single combined fixed bed reactor in a stacked fixed bed reaction device is shown.

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

[0017] Figure 8 for Figure 1 A partial view of the corrosion-resistant thermoplastic polymer welding rods adjacent to the flap body in the stacked fixed-bed reactor shown.

[0018] Marked in the figure are: stacked fixed bed reaction device 10; combined fixed bed reactor 11; cylinder 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 discharge port 114; tie unit 115; upper reinforcing stress flange 1151; lower reinforcing stress flange 1152; tie screw 1153; reactor cylinder cover 116, corrosion-resistant thermoplastic polymer welding rod 117. DETAILED DESCRIPTION

[0019] The present invention is described clearly and completely below with reference to the accompanying drawings. A person skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention with reference to the accompanying drawings, it should be noted that:

[0020] The technical solutions and technical features provided in each section, including the following description, may be combined with each other unless they conflict. In addition, where possible, these technical solutions, technical features, and related combinations may be assigned specific technical themes and protected by relevant patents.

[0021] The embodiments of the present invention involved in the following description are generally only a part of the embodiments rather than all the embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making any creative work should fall within the scope of patent protection.

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

[0023] To address the shortcomings of the modular design schemes for catalytic flue gas desulfurization equipment in the referenced documents, an improved stacked fixed-bed reactor 10 is provided below. This stacked fixed-bed reactor 10 functions as a flue gas desulfurization tower. Specifically, the fixed bed disposed within the reactor cylinder of each modular fixed-bed reactor 11 serves as a flue gas desulfurization catalyst bed. The desulfurization principles and operating methods of each modular fixed-bed reactor 11 are consistent with the catalytic flue gas desulfurization technology described in the background art. Furthermore, the regeneration liquid diversion structure (if any) at the bottom of the reactor cylinder of each modular fixed-bed reactor 11 is used to discharge the flue gas desulfurization catalyst regeneration liquid.

[0024] Alternatively, these stacked fixed-bed reactors 10 are not limited to use as flue gas desulfurization towers. For example, these stacked fixed-bed reactors 10 can also be used as flue gas denitrification towers. In this case, the fixed bed provided in the reactor cylinder of each combined fixed-bed reactor 11 is a flue gas denitrification catalyst bed, and the regeneration liquid guide structure (if any) at the bottom of the reactor cylinder of each combined fixed-bed reactor 11 is used to discharge the flue gas denitrification catalyst regeneration liquid.

[0025] Figure 1 This is an external front view of a 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 reaction device is shown. Figure 3 for Figure 1 The right side view of the stacked fixed bed reaction device is shown. Figure 4 for Figure 1 The external partial view of the stacked fixed bed reaction device is shown. Figure 5 for Figure 1 The overall disassembly diagram of the stacked fixed bed reaction device is shown. Figure 6 for Figure 1 The disassembly diagram of a single combined fixed bed reactor in a stacked fixed bed reaction device is shown. Figure 7 for Figure 1 A partial view of the adjacent flap body in the stacked fixed bed reaction device is shown. Figure 8 for Figure 1 A partial view of the corrosion-resistant thermoplastic polymer welding rods adjacent to the flap 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 modular fixed-bed reactors 11, the reactor cylinders of these modular fixed-bed reactors 11 being stacked together by being vertically butted against each other. In this embodiment, the stacked fixed-bed reactor 10 specifically includes three modular fixed-bed reactors 11: an upper modular fixed-bed reactor 11, a middle modular fixed-bed reactor 11, and a lower modular fixed-bed reactor 11, from top to bottom. This stacked fixed-bed reactor 10 can effectively reduce the device's footprint and significantly shorten the construction period through modular assembly.

[0027] The reactor barrel of each combined fixed-bed reactor 11 has a side wall assembled from a plurality of barrel flaps 111 divided from the circumferential direction of the reactor barrel. In this embodiment, each reactor barrel is assembled from eight barrel flaps 111. The flap body of each barrel flap 111 is an arc-shaped plate. The reactor barrel formed after assembly is a circular barrel (with an outer diameter of approximately 8m). Viewed along the central axis of the reactor barrel, the maximum width of each barrel flap 111 does not exceed 4m, ensuring the transportation convenience of the barrel flap 111. This segmented design solves the technical problem of limited overall transportation of large-diameter reactor barrels, allowing large-diameter reactor barrels required for large-scale projects to be conveniently transported to the construction site using standard transportation tools.

[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° angled plate or a straight plate, which forms a rectangular reactor cylinder after assembly to adapt to different engineering requirements and spatial layouts.

[0029] Combined fixed-bed reactor 11 also has an air inlet 112, an exhaust port 113, and a liquid drain port 114 for the inlet and outlet of flue gas and the discharge of regeneration liquid. The air inlet 112 is located at the lower sidewall of combined fixed-bed reactor 11, the exhaust port 113 is located at the upper sidewall of combined fixed-bed reactor 11, and the liquid drain port 114 is located at the bottom of combined fixed-bed reactor 11. This layout facilitates uniform distribution and circulation of gas and efficient discharge of regeneration liquid.

[0030] like Figure 6 and Figure 7As shown, each cylindrical flap 111 includes a flap body, a first side docking structure 111a and a second side docking structure 111b. The first side docking structure 111a is arranged on the first side of the flap body, and the second side docking structure 111b is arranged on the second side of the flap body. The first side docking structure 111a of any flap body is used to adapt and dock with the second side docking structure 111b of the flap body of another cylindrical flap 111 adjacent to the first side docking structure; the second side docking structure 111b of any flap body is used to adapt and dock with the first side docking structure 111a of the flap body of another cylindrical flap 111 adjacent to the second side docking structure. This docking design enables the cylindrical flaps 111 to be tightly combined to form an integral reactor cylinder with stable structure and good airtightness.

[0031] The first side docking structure 111a includes a first side flange of the flap body, on which first side bolt mounting holes are distributed; the second side docking structure 111b includes a second side flange of the flap body, on which second side bolt mounting holes are distributed. The adjacent first side flanges of the flap body and the second side flanges of the flap body can be fitted together by means of flap side locking bolts passing through the first side bolt mounting holes and the second side bolt mounting holes corresponding to each other. The first side flange of the flap body and the second side flange of the flap 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 barrel cover 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 barrel cover 116 located below it. This top-bottom docking structure design facilitates longitudinal assembly of the reactor barrel and helps to achieve a secure connection between the modular fixed-bed reactors 11.

[0033] The top docking structure 111c includes a top flange of the flap body, which is provided with top bolt mounting holes. The bottom docking structure 111d includes a bottom flange of the flap body, which is provided with bottom bolt mounting holes. The flap body top flange and the reactor barrel cover 116 located above the flap body top flange are connected by the flap plate top locking bolts inserted through the corresponding top bolt mounting holes and the peripheral bolt mounting holes of the reactor barrel cover 116. The flap body bottom flange can be connected to the reactor barrel cover 116 located below the flap body bottom flange through the flap plate bottom locking bolts inserted through the corresponding bottom bolt mounting holes and the peripheral bolt mounting holes of the reactor barrel cover 116. This bolt locking system ensures a reliable and airtight connection while facilitating on-site assembly and maintenance.

[0034] like Figure 5 and Figure 6 As shown, between the reactor barrels of the stacked combined fixed-bed reactors 11, the bottom flange of the flap body of the barrel flap 111 of the upper combined fixed-bed reactor 11, the reactor barrel cover 116 below the bottom flange of the flap body, and the top flange of the flap body of the barrel flap 111 of the reactor barrel of the combined fixed-bed reactor 11 below the reactor barrel cover 116 are fitted together by locking bolts at the bottom of the flap that are passed through corresponding bottom bolt mounting holes, peripheral bolt mounting holes of the reactor barrel cover 116, and top bolt mounting holes. This "sandwich" connection structure greatly enhances the overall stability of the stacked device 10, effectively reduces the lateral shear stress at the joints between adjacent reactor barrels, and significantly improves the safety of the device in harsh environments.

[0035] It is worth noting that the reactor cylinder cover 116 is 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, so that when multiple combined fixed bed reactors 11 are stacked into a stacked fixed bed reaction device 10, the overall center of gravity of the stacked fixed bed reaction device 10 is lower.

[0036] like Figure 7 and Figure 8As shown, the flap body has a layered composite flap inner layer material and a flap outer layer material. The flap inner layer material is made of a corrosion-resistant thermoplastic polymer, and the flap outer layer material is made of a fiber-reinforced composite material or steel. This composite structural design not only ensures the corrosion resistance of the interior of the reactor barrel, but also provides sufficient mechanical strength, extends the service life of the equipment, and reduces 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] A bonding layer is placed between the inner and outer flap materials, using a thermally stable structural adhesive. This adhesive can be selected from modified epoxy resins, phenolic resins, silicones, polyimide adhesives, or thermosetting composite resins. This bonding layer ensures a secure bond between the inner and outer layers, preventing delamination under temperature fluctuations and operating loads.

[0038] Preferably, the outer layer material of the flap is made of fiber-reinforced composite material, and the inner layer material of the flap is made of corrosion-resistant thermoplastic polymer. This combination can significantly reduce the weight of the cylindrical flap 111 compared to the steel structure, greatly reducing the overall weight of the combined fixed-bed reactor 11, which not only simplifies the transportation and installation process, but also reduces the complexity and cost of the foundation engineering, while maintaining the strength of the combined fixed-bed reactor 11. In this structure, the corrosion-resistant thermoplastic polymer of the inner layer mainly assumes the anti-corrosion function, while the fiber-reinforced composite material of the outer layer mainly provides mechanical strength and structural support. This functional division of labor design enables the combined fixed-bed reactor 11 to have excellent corrosion resistance while maintaining the necessary mechanical strength, while significantly reducing the overall weight.

[0039] Further preferably, the fiber-reinforced composite material is a glass fiber-reinforced composite material with a vinyl ester resin or epoxy resin matrix. This material not only has high mechanical strength but also exhibits a certain degree of corrosion resistance. It can provide a second protective barrier against corrosion penetration from the external environment, further extending the service life of the combined fixed-bed reactor 11. The use of this corrosion-resistant fiber-reinforced composite material can significantly improve the overall durability of the equipment, especially for operating conditions where it may come into contact with acidic or alkaline media.

[0040] Corrosion-resistant thermoplastic polymer repair weld grooves are provided at the corresponding first and second side edges of the inner material of the flaps. Accordingly, the modular fixed-bed reactor 11 also includes corrosion-resistant thermoplastic polymer welding rods 117 welded to the corresponding corrosion-resistant thermoplastic polymer repair weld grooves of the adjacent flap bodies to form a continuous corrosion-resistant thermoplastic polymer barrier. This repair weld design solves the corrosion protection issue at the connection between the cylinder flaps 111, ensuring a complete corrosion-resistant barrier within the reactor cylinder, preventing corrosive media from penetrating the outer structure and significantly extending the service life of the equipment.

[0041] like Figure 4 、 Figure 5 As shown, the reactor cylinders of the stacked modular fixed-bed reactors 11 are butted together via a set of cylinder docking flange connection structures (i.e., comprising the aforementioned top flange of the flap body, the bottom flange of the flap body, the reactor cylinder cover plate 116, and corresponding locking bolts). A cylinder body tie system is provided on the outside of the cylinder docking flange connection structure. The cylinder body tie system comprises multiple sets of tie units 115 arranged at intervals around the cylinder docking flange connection structure. This cylinder body tie system serves as a supplementary reinforcement measure for the cylinder docking flange connection structure, significantly improving the overall stability of the stacked structure.

[0042] Each group of tie units 115 includes an upper reinforcing stress-bearing flange 1151, a lower reinforcing stress-bearing flange 1152, and a tie screw 1153. The upper reinforcing stress-bearing flange 1151 is fixed to the barrel of the reactor barrel located at the upper side of the reactor barrels of the combined fixed-bed reactors 11 stacked on each other; the lower reinforcing stress-bearing flange 1152 is fixed to the barrel of the reactor barrel located at the lower side of the reactor barrels of the combined fixed-bed reactors 11 stacked on each other. The upper end of the tie screw 1153 passes through the upper reinforcing stress-bearing flange 1151 and is connected to the upper locking nut, while the lower end passes through the lower reinforcing stress-bearing flange 1152 and is connected to the lower locking nut. This design of the tie unit 115 provides a pre-tightening force through the tie screw 1153, so that a stable tie structure is formed between the upper and lower combined fixed-bed reactors 11, effectively solving the technical problem of insufficient connection stability between the combined fixed-bed reactors 11 stacked on each other.

[0043] The tie screw 1153 in the barrel tie system is arranged parallel to the central axis of the reactor barrel of the stacked fixed-bed reactor 11. The upper reinforced stress-bearing flange 1151 and the lower reinforced stress-bearing flange 1152 each include the following integrally connected components: a base plate, fitted and fixed to the outer wall of the barrel of the corresponding reactor barrel; a first side wing plate, arranged on the first side edge of the base plate; a second side wing plate, arranged on the second side edge of the base plate; and a web plate, arranged between the first and second side wing plates and intersecting with the base plate, with a tie screw mounting hole for inserting the tie screw 1153 on the web plate. This reinforced stress-bearing flange structural design enhances load-bearing capacity, prevents deformation during tie stress, and ensures long-term and reliable operation of the tie system.

[0044] The above-mentioned barrel tie-in system adopts an external design, which does not occupy the internal space of the reactor barrel, does not affect the effective volume of the combined fixed bed reactor 11 and the filling height of the catalyst bed at all, and maximizes the processing capacity of the equipment. Secondly, the tie-in unit 115 can be installed after the combined fixed bed reactor 11 is assembled, which greatly simplifies the on-site construction process. In addition, the barrel tie-in system has high adaptability and can flexibly adjust the number and distribution position of the tie-in units 115 according to actual working conditions. It is suitable for stacking combined fixed bed reactors 11 of different specifications and sizes. More importantly, the design of the barrel tie-in system enables each tie-in unit 115 to bear the load independently. Even if an individual tie-in unit 115 fails, it will not affect the safety of the overall structure, which significantly improves the reliability and safety margin of the stacked fixed bed reaction device 10. The barrel tie-in system works in conjunction with the flat reactor barrel cover 116, eliminating the problem of increased stacking height caused by the traditional funnel-shaped lower baffle structure. In addition, the barrel tie system forms a circumferential bending reinforcement structure through evenly distributed tie units 115, which significantly improves the bending stiffness and structural strength of the entire stacked fixed bed reactor 10 under horizontal seismic forces and wind loads. Especially for large-diameter reactor barrels, this reinforcement effect is more obvious, effectively preventing displacement or cracking at the stacked joints under extreme working conditions.

[0045] Through the above-described design, the stacked fixed-bed reactor 10 of the present invention not only solves the technical problem of limited transport of large-diameter reactor cylinders, but also enhances the overall stability of the stacked structure through the cylinder tie system. Furthermore, the layered composite material structure improves the equipment's corrosion resistance. This makes the stacked fixed-bed reactor 10 particularly suitable for large-scale catalytic flue gas desulfurization projects, significantly improving construction efficiency and 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 a support structure design in the reference document to support the fixed bed, which is not shown in the drawings.

[0047] The above describes the relevant contents of the present invention. Based on this description, a person skilled in the art will be able to implement the present invention. Based on the above content of this specification, all other embodiments obtained by a person skilled in the art without making any creative efforts should fall within the scope of the present invention.

Claims

1. Stacked fixed bed reactor, comprising: At least two fixed-bed reactors, wherein the reactor cylinders of the fixed-bed reactors are stacked together by being vertically butted against each other; Furthermore, the reactor cylinders of the stacked fixed bed reactors are butted against each other via a set of cylinder butt flange connection structures; Its characteristics are: Between the reactor cylinders of the stacked fixed bed reactors, a cylinder body tie system is provided on the outside of the cylinder butt flange connection structure; The barrel body fastening system comprises a plurality of fastening units arranged at intervals around the barrel body butt flange connection structure; The tying unit comprises: The upper reinforced stress-bearing flange is fixed on the cylinder of the reactor cylinder of the fixed-bed reactor located at the upper position among the reactor cylinders of the stacked fixed-bed reactors; a lower reinforced stress-bearing flange fixed on the cylinder of the reactor cylinder of the fixed-bed reactor located at the bottom among the reactor cylinders of the stacked fixed-bed reactors; and The tie screw has an upper end passing through the upper reinforced stress-bearing flange and connected to the upper locking nut, and a lower end passing through the lower reinforced stress-bearing flange and connected to the lower locking nut.

2. The stacked fixed bed reactor according to claim 1, wherein: The drawing screw in the barrel drawing system is arranged parallel to the central axis of the reactor barrels of the stacked fixed bed reactors.

3. The stacked fixed bed reactor according to claim 1, wherein: The upper reinforced stress-bearing flange and / or the lower reinforced stress-bearing flange include the following components connected as one body: The bottom plate is fixedly attached to the outer wall of the cylinder of the corresponding reactor; A first side wing plate is provided on a first side edge of the bottom plate, a second side wing plate, arranged on a second side edge of the bottom plate; The web is arranged between the first side wing plate and the second side wing plate and intersects with the bottom plate. The web is provided with a tie screw mounting hole for passing a tie screw.

4. The stacked fixed bed reactor according to claim 1, wherein: Each reactor cylinder of the stacked fixed bed reactor has a side wall assembled from a plurality of cylinder flaps divided in a circumferential direction of the reactor cylinder. Each cylinder flap contains: Valve plate body; A first side docking structure is provided on a first side edge of the flap body; A second side docking structure is provided on a second side edge of the flap body; The first side docking structure of any flap body is adapted to be docked with the second side docking structure of the flap body of another cylindrical flap adjacent to the first side docking structure; The second side docking structure of any flap body is used for adaptive docking with the first side docking structure of the flap body of another cylindrical flap adjacent to the second side docking structure.

5. The stacked fixed bed reactor according to claim 4, wherein: The first side docking structure comprises a first side flange of the flap body, and first side bolt mounting holes are distributed on the first side flange of the flap body; The second side docking structure comprises a second side flange of the flap body, and second side bolt mounting holes are distributed on the second side flange of the flap body; The adjacent first side flanges of the flap plate body and the second side flanges of the flap plate body can be fitted together by means of flap plate side locking bolts passing through the first side bolt mounting holes and the second side bolt mounting holes corresponding to each other.

6. The stacked fixed bed reactor according to claim 5, wherein: The first side flange of the flap body and the second side flange of the flap body are extended along the central axis direction of the reactor cylinder.

7. The stacked fixed bed reactor according to claim 4, wherein: Each cylinder flap also includes: The top flange of the flap body is arranged on the top of the flap body, and top bolt mounting holes are distributed on the top flange of the flap body; The bottom flange of the flap body is arranged at the bottom of the flap body, and bottom bolt mounting holes are distributed on the bottom flange of the flap body; The top flange of the flap body is fitted with the reactor cylinder top plate located above the top flange of the flap body via flap top locking bolts passing through corresponding top bolt mounting holes and peripheral bolt mounting holes of the reactor cylinder top plate. The bottom flange of the flap body can be fitted with the reactor cylinder cover plate located below the bottom flange of the flap body through the flap bottom locking bolts provided in the corresponding bottom bolt mounting holes and the peripheral bolt mounting holes of the reactor cylinder cover plate; Between the reactor cylinders of the fixed bed reactors stacked on each other, the bottom flange of the flap body of the cylinder flap of the reactor cylinder of the fixed bed reactor located above, the reactor cylinder cover plate located below the bottom flange of the flap body, and the top flange of the flap body of the cylinder flap of the reactor cylinder of the fixed bed reactor located below the reactor cylinder cover plate, are fitted together by means of the flap bottom locking bolts passed through the corresponding bottom bolt mounting holes, the reactor cylinder cover plate peripheral bolt mounting holes and the top bolt mounting holes.

8. The stacked fixed bed reactor according to claim 4, wherein: The maximum width of each cylinder flap, viewed along the central axis of the reactor cylinder, does not exceed 4m or 4.2m; And / or, viewed along the central axis of the reactor cylinder, the flap body of each cylinder flap is an arc-shaped plate, a 90° angled 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° angled plate or a straight plate, the reactor cylinder is a rectangular cylinder.

9. The stacked fixed bed reactor according to claim 4, wherein: Each flap body comprises a flap inner layer material and a flap outer layer material which are layered composites, and the flap inner layer material is made of corrosion-resistant thermoplastic polymer.

10. The stacked fixed bed reactor according to claim 9, wherein: The edges of the inner layer material of the flap corresponding to the first side and the second side are provided with corrosion-resistant thermoplastic polymer repair welding grooves; each fixed bed reactor also includes corrosion-resistant thermoplastic polymer welding rods welded between the corresponding corrosion-resistant thermoplastic polymer repair welding grooves of the adjacent flap bodies to form a continuous corrosion-resistant thermoplastic polymer barrier.

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