Regeneration liquid guide structure for stacked fixed bed reaction device and stacked fixed bed reaction device

Abstract

This utility model discloses a regenerated liquid guiding structure for a stacked fixed-bed reactor and the stacked fixed-bed reactor itself, solving the technical problem of the high height of each fixed-bed reactor caused by the funnel-shaped structure designed in the reference document. It includes: a reactor shell cover plate, which is located at the bottom of the reactor shell of the fixed-bed reactor; and a guide platform, which is located above the reactor shell cover plate, with its outer edge adapted to the inner edge of the bottom of the reactor shell, and has a top inclined guide surface that intersects the horizontal plane at an acute angle; the discharge direction of the top inclined guide surface corresponds to the setting direction of the discharge port on the side wall of the reactor shell of the fixed-bed reactor. This reduces the overall height of each fixed-bed reactor, making the stacked fixed-bed reactor more compact, and also allows the regenerated liquid to flow quickly along the inclined guide surface to the discharge port, avoiding liquid stagnation and uneven distribution at the bottom of the reactor.

Description

Technical Field

[0001] This utility model relates to fixed-bed reaction equipment in the chemical industry, specifically to a regenerated liquid guiding structure for a stacked fixed-bed reaction device and the stacked fixed-bed reaction device.

[0002] "Fixed bed" refers to a solid bed in a reactor, which can be a catalyst (used to accelerate chemical reactions), an adsorbent (used to adsorb specific substances), and / or solid reactants. Background Technology

[0003] 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."

[0004] 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.

[0005] 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.

[0006] 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. Utility Model Content

[0007] The purpose of this invention is to provide the following regenerated liquid guiding structure and stacked fixed bed reactor for a stacked fixed bed reactor, solving the technical problem that the funnel-shaped structure designed in the reference document results in a high height of each fixed bed reactor.

[0008] In a first aspect, a regenerated liquid guiding structure is provided for a stacked fixed-bed reactor, the stacked fixed-bed reactor comprising at least two fixed-bed reactors, the reactor bodies of which are stacked together vertically and connected sequentially; the reactor bodies of the stacked fixed-bed reactors are connected by a set of reactor body flange connection structures; the structure includes: a reactor body cover plate disposed at the bottom of the reactor body of the fixed-bed reactor; and a guide platform disposed above the reactor body cover plate, the outer edge of which is adapted to the inner edge of the bottom of the reactor body, and having a top inclined guide surface at an acute angle to the horizontal plane; the discharge direction of the top inclined guide surface corresponds to the setting direction of the discharge port on the side wall of the reactor body of the fixed-bed reactor.

[0009] Secondly, a stacked fixed-bed reactor device is provided, comprising at least two fixed-bed reactors, wherein the reactor bodies of these fixed-bed reactors are stacked together in a vertical direction by being connected sequentially, and the bottom of the reactor body of each fixed-bed reactor is provided with the regenerated liquid guiding structure described in the first aspect.

[0010] By installing a regenerated liquid guiding structure, including a reactor shell cover and a guide platform, at the bottom of the reactor shell, the funnel-shaped structure design in the reference document is replaced. The guide platform has a top inclined guide surface that intersects the horizontal plane at an acute angle, and the discharge direction of this inclined guide surface corresponds to the setting direction of the discharge port on the side wall of the reactor shell. This effectively solves the technical problem that the funnel-shaped structure in the reference document results in a high height of each fixed bed reactor. This design not only reduces the overall height of each fixed bed reactor, making the stacked fixed bed reactor device more compact, but also allows the regenerated liquid to flow quickly along the inclined guide surface to the discharge port, avoiding the stagnation and uneven distribution of liquid at the bottom of the reactor, and ensuring the efficiency of regenerated liquid collection and discharge.

[0011] 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

[0012] Figure 1 This is an external front view of the stacked fixed bed reactor according to an embodiment of the present invention.

[0013] Figure 2 for Figure 1 Left view of the stacked fixed-bed reactor shown.

[0014] Figure 3 for Figure 1The right view of the stacked fixed-bed reactor shown.

[0015] Figure 4 for Figure 1 The above is a three-dimensional view of the stacked fixed-bed reactor.

[0016] Figure 5 for Figure 1 A partial external view of the stacked fixed-bed reactor shown.

[0017] Figure 6 for Figure 1 The cross-sectional view of the fixed bed support structure of the stacked fixed bed reactor shown.

[0018] Figure 7 for Figure 1 The diagram shows a disassembled single-unit fixed-bed reactor in a stacked fixed-bed reactor system.

[0019] Figure 8 for Figure 1 A perspective view of the regenerated liquid guiding structure of the stacked fixed-bed reactor shown.

[0020] Figure 9 for Figure 8 The front view of the guide vane is shown.

[0021] Figure 10 for Figure 8 The diagram shows the positional relationship between the guide platform and the corresponding air inlet and drain outlet.

[0022] Figure 11 for Figure 1 A cross-sectional view of the regenerated liquid guiding structure of the stacked fixed-bed reactor shown.

[0023] 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 outlet 113; Liquid outlet 114; Fixed bed support structure 115; Upper side wall 1151; Lower side wall 1152; Differential connecting shoulder 1153; Differential connecting shoulder reinforcement structure 1154; Flange reinforcement structure at the bottom of the flap body 1155; Reactor cylinder cover 116; Corrosion-resistant thermoplastic polymer weld bevel 117; Flow guide 118; Top inclined flow guide surface 1181. Detailed Implementation

[0024] 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:

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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 mode 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 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.

[0029] 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 regeneration liquid guiding structure at the bottom of the reactor shell of each combined fixed-bed reactor 11 is used to discharge the flue gas denitrification catalyst regeneration liquid.

[0030] 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 Left 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 The above is a three-dimensional view of the stacked fixed-bed reactor. Figure 5 for Figure 1A partial external view of the stacked fixed-bed reactor shown. Figure 6 for Figure 1 The cross-sectional view of the fixed bed support structure of the stacked fixed bed reactor shown. Figure 7 for Figure 1 The diagram shows a disassembled single-unit fixed-bed reactor in a stacked fixed-bed reactor system.

[0031] like Figures 1 to 7 As 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Each cylindrical petri plate 111 includes a petri plate body, a first side docking structure 111a, and a second side docking structure 111b. The first side docking structure 111a is disposed on a first side of the petri plate body, and the second side docking structure 111b is disposed on a second side of the petri plate body. The first side docking structure 111a of any petri plate body is adapted to dock with the second side docking structure 111b of the petri plate body of another cylindrical petri plate 111 adjacent to the first side docking structure; the second side docking structure 111b of any petri plate body is adapted to dock with the first side docking structure 111a of the petri plate body of another cylindrical petri plate 111 adjacent to the second side docking structure. This docking design allows the cylindrical petri plates 111 to be tightly joined together, forming a structurally stable and airtight integral reactor cylinder.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Between the stacked reactor bodies of the combined fixed-bed reactor 11, the bottom flange of the valve body of the upper combined fixed-bed reactor 11's valve body 111, the reactor body cover plate 116 located below the bottom flange of the valve body 116, and the top flange of the valve body of the combined fixed-bed reactor 11's valve body 111 located below the reactor body cover plate 116 are engaged by 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 (see reference). Figure 11 This "sandwich" connection structure greatly enhances the overall stability of the stacked device 10, effectively reduces the transverse shear stress at the joints between adjacent reactor cylinders, and significantly improves the safety of the device in harsh environments.

[0040] 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.

[0041] The valve body comprises 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] The inner layer material of the petal plate has corrosion-resistant thermoplastic polymer weld bevels 117 on the corresponding first and second sides. Correspondingly, the combined fixed-bed reactor 11 also includes corrosion-resistant thermoplastic polymer welding rods welded between the corresponding corrosion-resistant thermoplastic polymer weld bevels 117 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.

[0046] The reactor bodies of the stacked fixed-bed reactor 11 are connected by a set of flange connection structures (including the top flange of the above-mentioned flap body, the bottom flange of the flap body, the reactor body cover plate 116 and the corresponding locking bolts).

[0047] In addition, such as Figures 1 to 7 As shown, each combined fixed-bed reactor 11 has a fixed-bed support structure 115 inside. For example... Figure 6 As shown, the fixed bed support structure 115 includes an upper sidewall 1151, a lower sidewall 1152, and a reducing connecting shoulder 1153. The upper sidewall 1151 forms an outer barrier for the fixed bed placement area; the lower sidewall 1152 forms an outer barrier for the gas distribution area located below the fixed bed placement area, and the inner diameter of the lower sidewall 1152 is smaller than the inner diameter of the upper sidewall 1151; the reducing connecting shoulder 1153 connects the upper sidewall 1151 and the lower sidewall 1152, forming the fixed bed support structure 115 for placing the fixed bed support components. The fixed bed support components (such as the "ventilated support plate" in the reference document) are used to support the fixed bed placed in the fixed bed placement area.

[0048] A reducing-diameter connecting shoulder reinforcement structure 1154 is connected between the outer side of the lower sidewall 1152 and the lower end face of the reducing-diameter connecting shoulder 1153 to enhance the load-bearing capacity of the reducing-diameter connecting shoulder 1153 on the fixed bed support component. For example... Figure 6 As shown, the reducing-diameter connecting shoulder reinforcement structure 1154 includes multiple triangular support ribs arranged at intervals around the reactor shell. One straight edge of each triangular support rib is fixed to the outer side of the lower sidewall 1152, and the other straight edge is fixed to the lower end face of the reducing-diameter connecting shoulder 1153. The reducing-diameter connecting shoulder reinforcement structure 1154 also includes an annular support plate around the reactor shell. The annular support plate is fixed to the outer side of the lower sidewall 1152 and supports the lower part of these triangular support ribs.

[0049] In addition, such as Figure 6As shown, a bottom flange reinforcement structure 1155 is connected between the outer side of the lower sidewall 1152 and the upper end face of the bottom flange of the petal plate body. The bottom flange reinforcement structure 1155 further strengthens the structural strength of the bottom flange of the petal plate body, and improves the load-bearing capacity and stability of the bottom connection area of ​​the combined fixed bed reactor 11.

[0050] By designing the prefabricated components as a structure including an upper sidewall 1151, a lower sidewall 1152, and a reducing connecting shoulder 1153 connecting the two, the inner diameter of the lower sidewall 1152 is smaller than the inner diameter of the upper sidewall 1151. A fixed bed support structure 115 for placing the fixed bed support components is formed at the reducing connecting shoulder 1153. This constricted structure design allows the fixed bed support components to be directly placed on the reducing connecting shoulder 1153, simplifying the processing and installation of the fixed bed support structure and avoiding the cumbersome process of machining transverse through holes and inserting support beams in the reactor shell, as required by the prior art. At the same time, the reducing connecting shoulder 1153 provides reliable support for the fixed bed, ensuring the structural stability of the fixed bed reactor.

[0051] It is also worth emphasizing that the fixed bed support structure 115 of this utility model, through the constricted design of the upper side wall 1151, lower side wall 1152, and the unequal-diameter connecting shoulder 1153, significantly optimizes the center of gravity distribution of the stacked fixed bed reactor 10 while ensuring stable support of the fixed bed. In the stacked fixed bed reactor 10, the center of gravity of each layer of combined fixed bed reactor 11 is more concentrated relative to the central axis of the cylinder, reducing the eccentricity of the overall structure and effectively avoiding structural instability caused by center of gravity shift. This advantage is even more pronounced in multi-layered stacked tower structures, providing a more stable structural foundation for the entire stacked fixed bed reactor 10 and significantly improving its anti-overturning ability and overall safety in harsh environments.

[0052] Furthermore, the design of the unequal-diameter connecting shoulder reinforcement structure 1154 significantly enhances the load-bearing capacity of the unequal-diameter connecting shoulder 1153. Especially when the fixed bed is heavy, this support structure provides more reliable load-bearing capacity, avoiding structural deformation and fixed bed settlement. Simultaneously, this design also provides favorable spatial conditions for the uniform distribution of gas in the gas distribution zone, improving the contact efficiency between the gas and the catalyst, thereby enhancing the efficiency and stability of the entire reaction process.

[0053] It should also be noted that the design of the aforementioned fixed bed support structure 115 is not necessarily limited to the combined fixed bed reactor 11; its applicability can be extended to fixed bed reactors that use reactor bodies with sidewalls formed by prefabricated components. Specifically, for fixed bed reactors containing reactor bodies with sidewalls formed by prefabricated components, the prefabricated components can all adopt the aforementioned structural design with an upper sidewall, a lower sidewall, and a unequal connecting shoulder. The upper sidewall is used to form an outer barrier for the fixed bed placement area, and the lower sidewall is used to form an outer barrier for the gas distribution area located below the fixed bed placement area, with its inner diameter being smaller than that of the upper sidewall. The unequal connecting shoulder connects the upper and lower sidewalls to form the fixed bed support structure.

[0054] In this embodiment, the cylindrical petal plate 111 is manufactured as follows: First, the outer layer material of the petal plate is made using a mold forming process. During the forming process, the upper sidewall 1151, the lower sidewall 1152, and the differential connecting shoulder 1153 are directly integrated into the outer layer structure of the petal plate body, forming a constricted basic structure. Simultaneously, components such as triangular support ribs and annular support plates, which are used to reinforce the differential connecting shoulder 1154, are manufactured and fixed to the connection interface between the outer sidewall 1152 and the lower end face of the differential connecting shoulder 1153 by welding or bonding. After completing the fabrication of the outer layer structure and the reinforcing structure, the pre-prepared inner layer material of the petal plate is then bonded to the inner surface of the outer layer material of the petal plate through an adhesive layer, ensuring a strong bond between the inner and outer layers, thereby forming a complete layered composite structure. For the edges of the corresponding first and second sides of the inner layer material of the petal plate, a corrosion-resistant thermoplastic polymer weld bevel 117 is provided to facilitate welding with corrosion-resistant thermoplastic polymer welding rods during subsequent assembly, forming a continuous corrosion-resistant thermoplastic polymer barrier. This manufacturing method not only simplifies the processing technology of the fixed bed support structure 115, but also ensures the integrity and load-bearing capacity of the fixed bed support structure 115, so that the cylinder petal plate 111 has both the mechanical strength provided by the outer layer material and the excellent corrosion resistance provided by the inner layer material.

[0055] Figure 8 for Figure 1 A perspective view of the regenerated liquid guiding structure of the stacked fixed-bed reactor shown. Figure 9 for Figure 8 The front view of the guide vane is shown. Figure 10 for Figure 8 The diagram shows the positional relationship between the guide platform and the corresponding air inlet and drain outlet. Figure 11 for Figure 1 A cross-sectional view of the regenerant flow guiding structure in the stacked fixed-bed reactor shown. Figure 8-11 As shown, the stacked fixed-bed reactor 10 of this embodiment also includes the following regenerated liquid guiding structure for effectively guiding and discharging the regenerated liquid.

[0056] The regenerated liquid guiding structure includes a reactor shell cover plate 116 and a guide platform 118. The reactor shell cover plate 116 is located at the bottom of the reactor shell of the combined fixed bed reactor 11; the guide platform 118 is located above the reactor shell cover plate 116, with its outer edge adapted to the inner edge of the bottom of the reactor shell, and has a top inclined guide surface 1181 that intersects the horizontal plane at an acute angle. The discharge direction of the top inclined guide surface 1181 corresponds to the setting direction of the discharge port 114 of the combined fixed bed reactor 11.

[0057] The reactor shell cover 116 and the guide platform 118 can be independent components, a design that facilitates installation and maintenance. The reactor shell cover 116 is installed on the lower flange of the reactor shell of the combined fixed-bed reactor 11. Figures 9-10 As shown, the top inclined guide surface 1181 is a conical surface, and the lowest point of the conical surface is close to the corresponding drain port 114.

[0058] The flow guide platform 118 has a supporting frame and an outer impermeable material covering the supporting frame, with the top inclined flow guide surface 1181 formed by the outer impermeable material. The supporting frame and / or the outer impermeable material are made of corrosion-resistant thermoplastic polymer or fiber-reinforced composite material. Specifically, the corrosion-resistant thermoplastic polymer is selected from any one of polypropylene, polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl chloride, polyethylene, polyphenylene sulfide, polyamide, and chlorinated polyvinyl chloride; the fiber-reinforced composite material is 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. Preferably, the supporting frame is made of glass fiber reinforced composite grating.

[0059] When the stacked fixed-bed reactor 10 is used as a flue gas desulfurization tower, the fixed bed set in the reactor shell of each combined fixed-bed reactor 11 is a flue gas desulfurization catalyst bed, and the regenerated liquid guiding structure 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; when used as a flue gas denitrification tower, the fixed bed set in the reactor shell of each combined fixed-bed reactor 11 is a flue gas denitrification catalyst bed, and the regenerated liquid guiding structure 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.

[0060] By setting a regenerated liquid guiding structure, including a reactor shell cover plate 116 and a guide platform 118, at the bottom of the reactor shell, the funnel-shaped structure design in the reference document is replaced. The guide platform 118 has a top inclined guide surface 1181 that intersects the horizontal plane at an acute angle, and the discharge direction of the top inclined guide surface 1181 corresponds to the setting direction of the discharge port 114 on the side wall of the reactor shell. This effectively solves the technical problem that the funnel-shaped structure in the reference document results in a high height of each combined fixed bed reactor 11. This design not only reduces the overall height of each combined fixed bed reactor 11, making the stacked fixed bed reactor device 10 more compact, but also allows the regenerated liquid to flow quickly along the top inclined guide surface 1181 to the discharge port 114, avoiding the stagnation and uneven distribution of liquid at the bottom of the reactor, and ensuring the collection and discharge efficiency of the regenerated liquid.

[0061] The supporting framework and outer impermeable material are made of corrosion-resistant thermoplastic polymers or fiber-reinforced composite materials, ensuring that the flow guide platform 118 maintains structural integrity and functional stability under long-term contact with corrosive regenerated liquid. In particular, the top sloping flow guide surface 1181 formed by the outer impermeable material is in direct contact with the regenerated liquid, and its corrosion resistance directly affects the service life of the regenerated liquid flow guide structure. The supporting framework is made of glass fiber reinforced composite grating, which provides sufficient mechanical strength to support the weight of the outer impermeable material and the regenerated liquid, while also having a relatively light weight, reducing the load on the reactor shell cover plate 116.

[0062] The foregoing has described the relevant content of this utility model. Those skilled in the art will be able to implement this utility model 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 this utility model.

Claims

1. A regenerator flow guiding structure for stacked fixed-bed reactors. The stacked fixed-bed reactor includes at least two fixed-bed reactors, whose reactor cylinders are stacked together in a vertical direction by being connected sequentially. The reactor shells of the stacked fixed-bed reactors are connected by a set of shell-to-shell flange connection structures. Its features are: It includes: A reactor shell cover plate, wherein the reactor shell cover plate is disposed at the bottom of the reactor shell of the fixed-bed reactor; and A flow guide platform is provided above the reactor shell cover plate, with its outer edge adapted to the bottom inner edge of the reactor shell, and has a top inclined flow guide surface that intersects the horizontal plane at an acute angle. The discharge direction of the top inclined guide surface corresponds to the setting direction of the discharge port on the side wall of the reactor shell of the fixed bed reactor.

2. The regenerator flow guiding structure for a stacked fixed-bed reactor as described in claim 1, characterized in that: The reactor shell cover and the flow guide are independent components.

3. The regenerator flow guiding structure for a stacked fixed-bed reactor as described in claim 1, characterized in that: The reactor shell cover is installed on the flange at the lower end of the reactor shell of the fixed bed reactor.

4. The regenerator flow guiding structure for a stacked fixed-bed reactor as described in claim 1, characterized in that: The top inclined guide surface is a conical surface, and the lowest point of the conical surface is close to the corresponding drain port.

5. The regenerator flow guiding structure for a stacked fixed-bed reactor as described in claim 1, characterized in that: The guide platform has a supporting frame and an outer impermeable material covering the supporting frame, and the top inclined guide surface is formed by the outer impermeable material.

6. The regenerator flow guiding structure for a stacked fixed-bed reactor as described in claim 5, characterized in that: The supporting frame and / or the outer impermeable material are made of corrosion-resistant thermoplastic polymer or fiber-reinforced composite material.

7. The regenerator flow guiding structure for a stacked fixed-bed reactor as described in claim 6, characterized in that: The corrosion-resistant thermoplastic polymer is selected from any one of polypropylene, polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl chloride, polyethylene, polyphenylene sulfide, polyamide, and chlorinated polyvinyl chloride; The fiber-reinforced composite material is 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.

8. The regenerator flow guiding structure for a stacked fixed-bed reactor as described in claim 7, characterized in that: The supporting frame is made of glass fiber reinforced composite grating.

9. A stacked fixed-bed reactor, comprising: At least two fixed-bed reactors, whose reactor shells are stacked together in a vertical direction by being connected in sequence; The reactor shells of the stacked fixed-bed reactors are connected by a set of shell-to-shell flange connection structures. Its features are: The bottom of the reactor shell of each fixed-bed reactor is provided with a regenerated liquid guiding structure as described in any one of claims 1-8.

10. The stacked fixed-bed reactor as described in claim 9, characterized in that: Used as a flue gas desulfurization tower, the fixed bed set in the reactor shell of each fixed bed reactor is a flue gas desulfurization catalyst bed, and the regeneration liquid guiding structure at the bottom of the reactor shell of each fixed bed reactor is used to discharge the flue gas desulfurization catalyst regeneration liquid. Alternatively, it can be used as a flue gas denitrification tower, with the fixed bed in the reactor shell of each fixed bed reactor being a flue gas denitrification catalyst bed, and the regeneration liquid guiding structure at the bottom of the reactor shell of each fixed bed reactor being used to discharge the flue gas denitrification catalyst regeneration liquid.

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