Catalytic flue gas desulfurization device

Abstract

The utility model discloses a catalytic flue gas desulfurization device, solve the technical problem that the desulfurization reactor exists structure is heavy, construction cost is high, long period and the insufficient corrosion resistance. Among them, the shell of desulfurization reactor is formed by the inside and outside nesting of inner layer prefabricated integrated cylinder and outer layer prefabricated integrated cylinder, and the inner layer prefabricated integrated cylinder is made of corrosion -resistant thermoplastic polymer, and the outer layer prefabricated integrated cylinder is made of fiber reinforced composite material. Realized the prefabricated production of desulfurization reactor factory, and the weight is significantly lower than concrete structure, simplified the installation procedure, reduced the civil engineering requirement, reduced the on -the -spot construction workload, shortened the engineering construction period, reduced the catalytic flue gas desulfurization device maintenance frequency and cost, improved the operation reliability and economy of whole catalytic flue gas desulfurization device.

Description

Technical Field

[0001] This utility model relates to a catalytic flue gas desulfurization device. Background Technology

[0002] The basic principle of catalytic flue gas desulfurization technology is as follows: sulfur dioxide, water, and oxygen in the flue gas to be desulfurized are adsorbed onto the desulfurization catalyst (specifically, an activated carbon-based desulfurization catalyst) and react under the catalytic action of the active components to generate sulfuric acid; when the sulfuric acid adhering to the desulfurization catalyst reaches a certain level, the desulfurization catalyst can be washed with a regeneration liquid (usually dilute sulfuric acid and / or water) to remove the adhering sulfuric acid and release the active sites of the desulfurization catalyst; the regeneration liquid after use can be reused as a by-product (usually dilute sulfuric acid).

[0003] When catalytic flue gas desulfurization (FGD) technology is applied in practical engineering, a dedicated FGD tower is typically constructed, which contains a desulfurization reactor. Patent documents such as CN117547962A (hereinafter referred to as the reference document) provide a detailed description of self-developed catalytic flue gas desulfurization equipment. Generally speaking, existing catalytic flue gas desulfurization equipment (such as catalytic flue gas desulfurization towers) mainly includes a desulfurization reaction system, a regenerated liquid circulation system, and a flue gas conveying system. Of course, to control the operation of the catalytic flue gas desulfurization equipment, a control system is usually also included, which is connected to the instruments within the equipment.

[0004] The desulfurization reaction system includes multiple desulfurization reactors. Each desulfurization reactor has an air inlet, an exhaust outlet, a liquid outlet, and the catalyst located in the desulfurization reactor. The desulfurization reactor is equipped with a regeneration liquid spraying device for washing and regenerating the catalyst. During operation, the flue gas to be desulfurized enters the desulfurization reactor through the air inlet, is desulfurized by the catalyst, and is then discharged from the exhaust outlet of the desulfurization reactor as desulfurized flue gas. When the sulfur dioxide in the flue gas to be desulfurized passes through the catalyst, it reacts on the catalyst to form sulfuric acid. When the catalyst is washed and regenerated, the sulfuric acid enters the regeneration liquid sprayed on the catalyst and is discharged from the liquid outlet of the desulfurization reactor.

[0005] The regenerated liquid circulation system includes at least one regenerated liquid tank and a regenerated liquid circulation control network connecting the at least one regenerated liquid tank and each desulfurization reactor. The regenerated liquid circulation control network has an output-side control network, an input-side control network, and a regenerated liquid driving device. The output-side control network can guide the regenerated liquid in the selected regenerated liquid tank to the regenerated liquid spraying device of the selected desulfurization reactor. The input-side control network can guide the regenerated liquid output from the discharge port of the selected desulfurization reactor to the selected regenerated liquid tank. The regenerated liquid driving device can provide the required power to the regenerated liquid.

[0006] The flue gas conveying system includes an inlet pipe network and an exhaust pipe network. The inlet pipe network includes a main inlet pipe and inlet branch pipes connecting the main inlet pipe to the inlet of each desulfurization reactor. The exhaust pipe network includes a main exhaust pipe and exhaust branch pipes connecting the main exhaust pipe to the exhaust outlet of each desulfurization reactor. Because industrial-grade catalytic flue gas desulfurization equipment has a large flue gas processing capacity, the diameter of each inlet branch pipe is designed to be relatively large. To achieve on / off control of each inlet branch pipe, each inlet branch pipe typically has a bend that extends downwards, then bends back and extends upwards. When it is necessary to cut off the flue gas intake in a selected inlet branch pipe, a liquid sealing liquid is injected into the corresponding bend through a liquid inlet structure on the corresponding bend to form a liquid seal. When it is necessary to open the flue gas intake in a selected inlet branch pipe, the liquid sealing liquid in the corresponding bend is discharged through a liquid outlet structure on the corresponding bend.

[0007] For the aforementioned desulfurization reactor, the reference document proposes a corrosion protection method of laying acid-resistant plastic sheets on the inner wall of the concrete-cast desulfurization reactor shell. However, in actual construction and use, this method still has the following problems: the desulfurization reactor structure is bulky; the catalytic flue gas desulfurization tower requires extensive civil engineering and foundation treatment, resulting in high construction costs and long construction periods; the laying of acid-resistant plastic sheets involves a large amount of work, and once damaged, it requires immediate shutdown and repair, otherwise the concrete layer will corrode quickly. Similar problems also exist with the regeneration liquid tank. Utility Model Content

[0008] The present invention aims to provide a catalytic flue gas desulfurization device to solve the technical problems of the above-mentioned desulfurization reactor, such as bulky structure, high construction cost, long construction period, and insufficient corrosion resistance.

[0009] To address this, a catalytic flue gas desulfurization device is provided, comprising: a desulfurization reactor having an inlet for the flue gas to be desulfurized, an outlet for the desulfurized flue gas, a outlet for the desulfurization catalyst regeneration liquid, and a desulfurization catalyst loading space located within the desulfurization reactor; the desulfurization reactor is equipped with a desulfurization catalyst regeneration liquid spraying device for washing and regenerating the desulfurization catalyst in the desulfurization catalyst loading space; during desulfurization, the flue gas enters the desulfurization reactor from the inlet for the flue gas to be desulfurized, is then desulfurized by the desulfurization catalyst, and is then discharged from the outlet for the desulfurized flue gas. When the sulfur dioxide in the flue gas passes through the desulfurization catalyst, it reacts on the desulfurization catalyst to form sulfuric acid. During the washing and regeneration of the desulfurization catalyst, the sulfuric acid enters the desulfurization catalyst regeneration liquid and is regenerated from the desulfurization catalyst. The liquid is discharged from the outlet; the desulfurization reactor is divided into three layers from bottom to top: the flue gas distribution layer to be desulfurized, the desulfurization catalyst placement layer, and the desulfurized flue gas overflow layer. The flue gas distribution layer to be desulfurized is equipped with a distribution support structure, and the desulfurization catalyst is placed in the desulfurization catalyst placement layer above the distribution support structure. During desulfurization, the flue gas enters the flue gas distribution layer from the flue gas inlet to be desulfurized, and then passes through the distribution support structure from bottom to top through the desulfurization catalyst into the desulfurized flue gas overflow layer, and is discharged from the desulfurized flue gas outlet; the shell of the desulfurization reactor is composed of an inner prefabricated integrated cylinder and an outer prefabricated integrated cylinder nested inside each other. The inner prefabricated integrated cylinder is made of corrosion-resistant thermoplastic polymer, and the outer prefabricated integrated cylinder is made of fiber-reinforced composite material.

[0010] As an optimization and / or instance of the above-mentioned catalytic flue gas desulfurization device, 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.

[0011] As an optimization and / or instance of the above-mentioned catalytic flue gas desulfurization device, the fiber-reinforced composite material is selected from any one of glass fiber-reinforced composite materials, carbon fiber-reinforced composite materials, aramid fiber-reinforced composite materials, and basalt fiber-reinforced composite materials.

[0012] As an optimization and / or instance of the above-mentioned catalytic flue gas desulfurization device, the glass fiber reinforced composite material includes any one of the following: glass fiber reinforced unsaturated polyester resin composite material, glass fiber reinforced vinyl ester resin composite material, and glass fiber reinforced epoxy resin composite material.

[0013] As an optimization and / or instantiation of the above-mentioned catalytic flue gas desulfurization device, there is also an adhesive layer between the inner prefabricated integrated cylinder and the outer prefabricated integrated cylinder, and the adhesive layer adopts a thermally stable structural adhesive.

[0014] As an optimization and / or instance of the above-mentioned catalytic flue gas desulfurization device, the thermally stable structural adhesive is selected from any one of modified epoxy resin adhesive, phenolic resin adhesive, silicone adhesive, polyimide adhesive, and thermosetting composite resin adhesive.

[0015] As an optimization and / or instance of the above-mentioned catalytic flue gas desulfurization device, the gas distribution support structure includes a column layer, a main beam layer, a secondary beam layer, and a desulfurization catalyst support layer. The column layer includes columns arranged in a planar array on the bottom plate of the desulfurization reactor. The main beam layer is supported on the column layer and includes multiple main beams arranged at intervals. The secondary beam layer is erected on the main beam layer and includes multiple secondary beams arranged at intervals. The desulfurization catalyst support layer is laid on the secondary beam layer and is made of a breathable material for placing the desulfurization catalyst.

[0016] As an optimization and / or instance of the above-mentioned catalytic flue gas desulfurization device, it further includes: a vertical row of desulfurization reactors, comprising at least two desulfurization reactors vertically arranged and installed on support platforms on different floors of a frame-type support structure; an inlet pipe network, comprising a vertically arranged main inlet pipe and inlet branch pipes connecting the main inlet pipe to the inlet of each desulfurization reactor; an exhaust pipe network, comprising a vertically arranged main exhaust pipe and exhaust branch pipes connecting the main exhaust pipe to the exhaust outlet of each desulfurization reactor; and a regenerated liquid circulation system, comprising at least one regenerated liquid tank and a regenerated liquid circulation control pipe network connecting the at least one regenerated liquid tank and each desulfurization reactor, the regenerated liquid circulation control pipe network having an output-side control pipe network, an input-side control pipe network, and a regenerated liquid driving device, the output-side control pipe network being able to guide the regenerated liquid in the selected regenerated liquid tank into the regenerated liquid spray device of the selected desulfurization reactor, the input-side control pipe network being able to guide the regenerated liquid output from the discharge outlet of the selected desulfurization reactor into the selected regenerated liquid tank, and the regenerated liquid driving device being able to provide the required power to the regenerated liquid.

[0017] As an optimization and / or instance of the above-mentioned catalytic flue gas desulfurization device, at least one regenerated liquid tank includes: a prefabricated storage tank, the main body of which is made of corrosion-resistant thermoplastic polymer and sleeves made of corrosion-resistant thermoplastic polymer are distributed and installed inside, the two ends of each sleeve are respectively installed on opposite side walls of the prefabricated storage tank and are respectively sealed and connected to a pair of corresponding side wall openings; and a support structure, including an outer frame installed outside the prefabricated storage tank for accommodating and supporting the prefabricated storage tank and tie rods distributed and installed in the outer frame, each tie rod passing through the corresponding sleeve and its two ends being respectively tied to opposite side walls of the outer frame.

[0018] As an optimization and / or instantiation of the above-mentioned catalytic flue gas desulfurization device, the tie rod is a screw rod, and the two ends of each screw rod are locked to the outer frame by corresponding nuts.

[0019] The aforementioned catalytic flue gas desulfurization (FGD) unit employs a nested structure of an inner and outer prefabricated integrated cylinder, overcoming many shortcomings of existing technologies. The inner prefabricated integrated cylinder is made of corrosion-resistant thermoplastic polymer, ensuring excellent corrosion resistance in areas directly in contact with corrosive media, and the integrated design completely eliminates the risk of leakage. The outer prefabricated integrated cylinder is made of fiber-reinforced composite material, providing not only the necessary structural strength and rigidity but also excellent corrosion resistance, forming a "double barrier" protection system that significantly extends the service life of the desulfurization reactor. This modular design enables the factory prefabrication of the desulfurization reactor, resulting in a significantly lower weight than concrete structures, simplifying installation procedures, reducing civil engineering requirements, decreasing on-site construction workload, and shortening the construction cycle. It also reduces the maintenance frequency and cost of the catalytic FGD unit, improving the overall operational reliability and economy.

[0020] 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

[0021] The accompanying drawings, which form part of this specification, are used to aid in understanding the present invention. The contents provided in the drawings and their related descriptions in this specification can be used to explain the present invention, but do not constitute an undue limitation on the present invention.

[0022] Figure 1 This is a schematic diagram of the overall structure of the catalytic flue gas desulfurization device according to an embodiment of the present invention.

[0023] Figure 2 for Figure 1 A schematic diagram of the desulfurization reactor.

[0024] Figure 3 for Figure 1 A schematic diagram of the structure of the regeneration liquid tank.

[0025] Figure 4 for Figure 3 Schematic diagram of the installation structure of the tie rod.

[0026] The components are labeled as follows: desulfurization reactor 1, inner prefabricated integrated cylinder 11, outer prefabricated integrated cylinder 12, regeneration liquid tank 2, prefabricated storage tank 21, casing 211, support structure 22, outer frame 221, tie rod 222, and desulfurization catalyst 3. Detailed Implementation

[0027] 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:

[0028] 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.

[0029] 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.

[0030] 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.

[0031] like Figure 1 As shown, the catalytic flue gas desulfurization device of this embodiment includes a vertical row of desulfurization reactors, an inlet pipe network, an exhaust pipe network, and a regenerated liquid circulation system. The vertical row of desulfurization reactors comprises multiple desulfurization reactors 1 vertically arranged on support platforms on different floors of a frame-type support structure. The inlet pipe network includes a vertically arranged main inlet pipe and inlet branch pipes connecting the main inlet pipe to the inlet of each desulfurization reactor. The exhaust pipe network includes a vertically arranged main exhaust pipe and exhaust branch pipes connecting the main exhaust pipe to the exhaust outlet of each desulfurization reactor. The regenerated liquid circulation system includes multiple regenerated liquid tanks 2 and a regenerated liquid circulation control pipe network connecting each regenerated liquid tank 2 to each desulfurization reactor 1. The regenerated liquid circulation control network has an output-side control network, an input-side control network, and a regenerated liquid driving device. The output-side control network can guide the regenerated liquid in the selected regenerated liquid tank 2 into the desulfurization catalyst regenerated liquid spraying device of the selected desulfurization reactor 1. The input-side control network can guide the regenerated liquid output from the discharge port of the selected desulfurization reactor into the selected regenerated liquid tank. The regenerated liquid driving device can provide the required power to the regenerated liquid.

[0032] like Figure 2As shown, each desulfurization reactor 1 has an inlet for the flue gas to be desulfurized, an outlet for the desulfurized flue gas, a outlet for the desulfurization catalyst regeneration liquid, and a desulfurization catalyst loading space located within the reactor. The desulfurization reactor 1 is equipped with a desulfurization catalyst regeneration liquid spraying device for washing and regenerating the desulfurization catalyst 3 in the catalyst loading space. During desulfurization, the flue gas enters the desulfurization reactor 1 through the inlet for the flue gas to be desulfurized, passes through the desulfurization catalyst 3 for desulfurization, and then exits through the outlet for the desulfurized flue gas. The sulfur dioxide in the flue gas reacts on the desulfurization catalyst 3 to form sulfuric acid. During the washing and regeneration of the desulfurization catalyst 3, the sulfuric acid enters the desulfurization catalyst regeneration liquid and exits through the outlet for the desulfurization catalyst regeneration liquid.

[0033] The desulfurization reactor 1 is internally divided into three layers from bottom to top: a gas distribution layer for the flue gas to be desulfurized, a desulfurization catalyst placement layer, and a desulfurized flue gas overflow layer. The gas distribution layer for the flue gas to be desulfurized is equipped with a gas distribution support structure, and the desulfurization catalyst 3 is placed in the desulfurization catalyst placement layer above the gas distribution support structure. During desulfurization, the flue gas enters the gas distribution layer from the flue gas inlet, then passes through the gas distribution support structure, disperses upwards through the desulfurization catalyst 3, and enters the desulfurized flue gas overflow layer, exiting from the desulfurized flue gas exhaust port. The gas distribution support structure includes a column layer, a main beam layer, a secondary beam layer, and a desulfurization catalyst support layer. The column layer consists of columns arranged in a planar array on the bottom plate of the desulfurization reactor. The main beam layer is supported on the column layer and contains multiple spaced main beams. The secondary beam layer is erected on the main beam layer and contains multiple spaced secondary beams. The desulfurization catalyst support layer is laid on the secondary beam layer and is made of permeable material, used to place the desulfurization catalyst 3.

[0034] The structure of the catalytic flue gas desulfurization device described above has been described in detail in reference document (CN117547962A) and the prior art referenced in that reference document, and will not be repeated here.

[0035] The shell of the desulfurization reactor 1 is composed of an inner prefabricated integrated cylinder 11 and an outer prefabricated integrated cylinder 12 nested together. The inner prefabricated integrated cylinder 11 (U-shaped cylinder) is made of a corrosion-resistant thermoplastic polymer, and the outer prefabricated integrated cylinder 12 (also U-shaped cylinder) is made of fiber-reinforced composite material. 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. The glass fiber reinforced composite material may include any one of glass fiber reinforced unsaturated polyester resin composite material, glass fiber reinforced vinyl ester resin composite material, and glass fiber reinforced epoxy resin composite material.

[0036] The desulfurization reactor 1 adopts an inner prefabricated integrated cylinder 11 and an outer prefabricated integrated cylinder 12 nested structure. The inner prefabricated integrated cylinder 11 is made of corrosion-resistant thermoplastic polymer, ensuring excellent corrosion resistance in the parts in direct contact with corrosive media. The integrated design completely eliminates the risk of leakage. The outer prefabricated integrated cylinder 12 is made of fiber-reinforced composite material, which not only provides the necessary structural strength and rigid support, but also has good corrosion resistance, forming a "double barrier" protection system, which significantly extends the service life of the desulfurization reactor. This modular design enables the factory prefabrication of the desulfurization reactor, which is significantly lighter than concrete structures, simplifies the installation process, reduces civil engineering requirements, reduces on-site construction workload, and shortens the project construction cycle. It also reduces the maintenance frequency and cost of the catalytic flue gas desulfurization unit, and improves the operational reliability and economy of the entire catalytic flue gas desulfurization unit.

[0037] An adhesive layer may also be provided between the inner prefabricated integrated cylinder 11 and the outer prefabricated integrated cylinder 12. The adhesive layer uses a heat-stable structural adhesive. The heat-stable structural adhesive can be any one of self-modified epoxy resin, phenolic resin, silicone, polyimide, or thermosetting composite resin.

[0038] When using thermally stable structural adhesives such as modified epoxy resin, phenolic resin, silicone, polyimide, or thermosetting composite resin, these materials inherently possess a certain degree of chemical corrosion resistance. The adhesive layer, acting as an additional protective barrier, effectively prevents corrosive media from diffusing and penetrating outwards when minor damage occurs to the inner prefabricated integrated cylinder 11, thus avoiding direct contact between corrosive substances and the outer prefabricated integrated cylinder 12. Simultaneously, the adhesive layer fills the minute gaps between the two cylinder layers, forming a completely sealed integral structure, eliminating potential corrosion hazards, and further enhancing the corrosion resistance and service life of the entire desulfurization reactor shell.

[0039] The assembly process of the inner prefabricated integrated cylinder 11 and the outer prefabricated integrated cylinder 12 is as follows: First, the inner prefabricated integrated cylinder 11 and the outer prefabricated integrated cylinder 12 are prefabricated in the factory to ensure dimensional accuracy and shape matching; then, a heat-stable structural adhesive is uniformly coated on the outer surface of the inner prefabricated integrated cylinder 11 to form an adhesive layer; next, the inner prefabricated integrated cylinder 11 is carefully embedded into the interior of the outer prefabricated integrated cylinder 12 to ensure that the adhesive layer between the two cylinders is evenly distributed without air bubbles or gaps; then, a heat curing treatment is performed at an appropriate temperature to ensure that the adhesive layer is fully cured; finally, the airtightness and liquid tightness tests are performed on the assembled double-layer cylinder structure to ensure that the sealing performance of the overall structure meets the requirements.

[0040] Furthermore, each regenerated liquid tank 2 in the regenerated liquid circulation system adopts a combined corrosive liquid storage device structure, including a prefabricated storage tank 21 and a supporting structure 22. The main body of the prefabricated storage tank 21 is made of a corrosion-resistant thermoplastic polymer, which can effectively resist the erosion of corrosive media such as sulfuric acid. 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, depending on the specific application environment and the characteristics of the corrosive media.

[0041] The prefabricated storage tank 21 is internally equipped with sleeves 211 made of corrosion-resistant thermoplastic polymer. The two ends of each sleeve 211 are respectively installed on opposite side walls of the prefabricated storage tank 21 and are sealed and connected to corresponding pair of side wall openings. The side walls of the prefabricated storage tank 21 and the sleeves 211 are connected by hot-melt welding to ensure the sealing and structural integrity of the connection. In addition, the prefabricated storage tank 21 also has distributed columns, which are also made of corrosion-resistant thermoplastic polymer. Their two ends are respectively installed on the bottom plate and top plate of the prefabricated storage tank 21 by hot-melt welding, forming a stable internal support structure.

[0042] The support structure 22 includes an outer frame 221 installed outside the prefabricated storage tank 21 to accommodate and support it, and tie rods 222 distributed and installed within the outer frame 221. The outer frame 221 is a steel frame, providing overall rigid support. Each tie rod 222 is inserted into a corresponding sleeve 211, and its two ends are respectively tied to opposite side walls of the outer frame 221. The tie rods 222 are threaded rods, and the two ends of each threaded rod are locked to the outer frame 221 by corresponding nuts. The tension of the tie rod 222 can be controlled by adjusting the nuts.

[0043] In this embodiment, the prefabricated storage tank 21 is a rectangular tank structure. Depending on the force requirements, the sleeves 211 and corresponding tie rods 222 inside the rectangular tank can be arranged in two different ways: one is that they are all arranged in the same direction, which is suitable for situations where the unidirectional force is large; the other is that a portion of the sleeves 211 and tie rods 222 inside the rectangular tank are arranged perpendicularly to the remaining portion of the sleeves 211 and tie rods 222 to form a grid-like support structure, which is suitable for situations where the force is multidirectional and further improves the stability of the overall structure.

[0044] The main body of the prefabricated storage tank 21 is made of corrosion-resistant thermoplastic polymer, ensuring excellent corrosion resistance on the surfaces in direct contact with corrosive liquids. Internally installed sleeves 211, also made of corrosion-resistant thermoplastic polymer, are sealed to the side walls of the prefabricated storage tank 21, providing installation space and corrosion protection for subsequent tie rods 222. The outer frame 221 in the support structure 22 provides overall support for the prefabricated storage tank 21, while the tie rods 222, distributed within the outer frame 221, pass through corresponding sleeves 211 and tie the opposite side walls of the outer frame 221, forming an efficient load-bearing system that significantly enhances the structural stability and load-bearing capacity of the prefabricated storage tank 21. This design cleverly combines corrosion resistance with structural strength, avoiding the cumbersome nature of traditional concrete structures and the insufficient strength of single-material structures. It achieves factory prefabrication, significantly reducing on-site construction workload and time, minimizing civil engineering investment, while ensuring the long-term safety and reliability of corrosive liquid storage. This provides an ideal solution for the regeneration liquid tank 2 of the catalytic flue gas desulfurization unit.

[0045] 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 catalytic flue gas desulfurization device, comprising: The desulfurization reactor has an inlet for flue gas to be desulfurized, an outlet for desulfurized flue gas, an outlet for desulfurization catalyst regeneration liquid, and a desulfurization catalyst loading space located in the desulfurization reactor. The desulfurization reactor is equipped with a desulfurization catalyst regeneration liquid spraying device for washing and regenerating the desulfurization catalyst in the desulfurization catalyst loading space. During desulfurization, flue gas enters the desulfurization reactor from the flue gas inlet to be desulfurized, then passes through the desulfurization catalyst for desulfurization, and is then discharged from the desulfurized flue gas outlet. When sulfur dioxide in the flue gas passes through the desulfurization catalyst, it reacts on the desulfurization catalyst to form sulfuric acid. When the desulfurization catalyst is washed and regenerated, sulfuric acid enters the desulfurization catalyst regeneration liquid and is discharged from the desulfurization catalyst regeneration liquid outlet. The desulfurization reactor is divided into three layers from bottom to top: a flue gas distribution layer for desulfurized flue gas, a desulfurization catalyst placement layer, and a desulfurized flue gas overflow layer. The flue gas distribution layer for desulfurized flue gas is equipped with a distribution support structure. The desulfurization catalyst is placed in the desulfurization catalyst placement layer above the distribution support structure. During desulfurization, the flue gas enters the flue gas distribution layer from the flue gas inlet for desulfurized flue gas, and then passes through the distribution support structure from bottom to top through the desulfurization catalyst into the desulfurized flue gas overflow layer and is discharged from the desulfurized flue gas exhaust port. Its features are: The shell of the desulfurization reactor is composed of an inner prefabricated integrated cylinder and an outer prefabricated integrated cylinder nested inside each other. The inner prefabricated integrated cylinder is made of corrosion-resistant thermoplastic polymer, and the outer prefabricated integrated cylinder is made of fiber-reinforced composite material.

2. The catalytic flue gas desulfurization device as described in claim 1, 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.

3. The catalytic flue gas desulfurization device as described in claim 1, characterized in that: 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.

4. The catalytic flue gas desulfurization device as described in claim 3, characterized in that: Glass fiber reinforced composite materials include any one of the following: glass fiber reinforced unsaturated polyester resin composite materials, glass fiber reinforced vinyl ester resin composite materials, and glass fiber reinforced epoxy resin composite materials.

5. The catalytic flue gas desulfurization device as described in claim 1, characterized in that: There is also an adhesive layer between the inner prefabricated integrated cylinder and the outer prefabricated integrated cylinder, which uses a thermally stable structural adhesive.

6. The catalytic flue gas desulfurization device as described in claim 5, characterized in that: The thermally stable structural adhesive is selected from any one of modified epoxy resin adhesives, phenolic resin adhesives, silicone adhesives, polyimide adhesives, and thermosetting composite resin adhesives.

7. The catalytic flue gas desulfurization device as described in claim 1, characterized in that: The gas distribution support structure includes a column layer, a main beam layer, a secondary beam layer, and a desulfurization catalyst support layer. The column layer consists of columns arranged in a planar array on the bottom plate of the desulfurization reactor. The main beam layer is supported on the column layer and contains multiple main beams arranged at intervals. The secondary beam layer is erected on the main beam layer and contains multiple secondary beams arranged at intervals. The desulfurization catalyst support layer is laid on the secondary beam layer and is made of breathable material, used to place the desulfurization catalyst.

8. A catalytic flue gas desulfurization device according to any one of claims 1-7, characterized in that: include: A vertical row of desulfurization reactors includes at least two desulfurization reactors that are vertically arranged and installed on support platforms on different floors of a frame-type support structure. The intake network includes a vertically arranged main intake pipe and intake branch pipes that connect the main intake pipe to the intake ports of each desulfurization reactor. The exhaust network includes a vertically installed main exhaust pipe and exhaust branch pipes that connect the main exhaust pipe to the exhaust ports of each desulfurization reactor. The regenerated liquid circulation system includes at least one regenerated liquid tank and a regenerated liquid circulation control network connecting the at least one regenerated liquid tank and each desulfurization reactor. The regenerated liquid circulation control network has an output-side control network, an input-side control network, and a regenerated liquid driving device. The output-side control network can guide the regenerated liquid in the selected regenerated liquid tank to the regenerated liquid spray device of the selected desulfurization reactor. The input-side control network can guide the regenerated liquid output from the discharge port of the selected desulfurization reactor to the selected regenerated liquid tank. The regenerated liquid driving device can provide the required power to the regenerated liquid.

9. A catalytic flue gas desulfurization device as described in claim 8, characterized in that: At least one regeneration tank includes: A prefabricated storage tank, the main body of which is made of corrosion-resistant thermoplastic polymer and internally fitted with sleeves made of corrosion-resistant thermoplastic polymer. The two ends of each sleeve are respectively installed on opposite side walls of the prefabricated storage tank and are sealed and connected to corresponding pair of side wall openings; and The support structure includes an outer frame installed outside the prefabricated storage tank to accommodate and support the prefabricated storage tank, and tie rods distributed and installed in the outer frame. Each tie rod is inserted into a corresponding sleeve and its two ends are respectively tied to the opposite side walls of the outer frame.

10. A catalytic flue gas desulfurization device as described in claim 9, characterized in that: The tie rods are threaded rods, and each threaded rod is locked to the outer frame at both ends by a corresponding nut.

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