Combined corrosive liquid storage device and catalytic flue gas desulfurization device

Abstract

The utility model discloses a combined corrosive liquid storage device and catalytic flue gas desulfurization device, solve the technical problem of the heavy structure of regenerative liquid tank, high construction cost, long period and insufficient corrosion resistance. Including: prefabricated storage tank, prefabricated storage tank main part is made of corrosion -resistant thermoplastic polymer and is distributed to install the sleeve pipe made of corrosion -resistant thermoplastic polymer, and the both ends of each sleeve pipe are installed on the opposite two side walls of prefabricated storage tank and are sealed connection lead -through with corresponding pair of side wall opening respectively, and support structure contains the outer frame of installation in prefabricated storage tank and is used to accommodate and support prefabricated storage tank and the pull rod of distribution installation in outer frame, and each pull rod is correspondingly worn in the corresponding sleeve pipe and is drawn to tie up the opposite two side walls on outer frame respectively. Realized the factory prefabricated production, reduced the field construction workload and period greatly, reduced the civil engineering investment, ensured the long -term safety and reliability of corrosive liquid storage.

Description

Technical Field

[0001] This utility model relates to a combined corrosive liquid storage device and 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 combined corrosive liquid storage device and a catalytic flue gas desulfurization device to solve the technical problems of the above-mentioned regeneration liquid tank being bulky, having high construction costs and long construction periods, and having insufficient corrosion resistance.

[0009] In one aspect, a combined corrosive liquid storage device is provided, comprising: a prefabricated storage tank, the main body of which is made of a corrosion-resistant thermoplastic polymer and sleeves made of the same polymer are distributed and installed inside the tank, the two ends of each sleeve being respectively installed on opposite side walls of the prefabricated storage tank and respectively sealed and connected to a pair of corresponding side wall openings; and a support structure, comprising an outer frame installed outside the prefabricated storage tank for accommodating and supporting the tank, and tie rods distributed and installed in the outer frame, each tie rod being correspondingly inserted into a corresponding sleeve and its two ends being respectively tied to opposite side walls of the outer frame.

[0010] As an optimization and / or instantiation of the combined corrosive liquid storage device of the first aspect mentioned above, the tie rod is a screw rod, and the two ends of each screw rod are locked to the outer frame by corresponding nuts.

[0011] As an optimization and / or instantiation of the combined corrosive liquid storage device of the first aspect mentioned above, the outer frame is a steel frame.

[0012] As an optimization and / or instance of the combined corrosive liquid storage device of the first aspect above, 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.

[0013] As an optimization and / or instantiation of the combined corrosive liquid storage device of the first aspect mentioned above, the sidewall of the prefabricated storage tank is connected to the casing by thermofusion welding.

[0014] As an optimization and / or instance of the combined corrosive liquid storage device of the first aspect mentioned above, the prefabricated storage tank is provided with columns made of corrosion-resistant thermoplastic polymer distributedly, with the two ends of each column respectively installed on the bottom plate and top plate of the prefabricated storage tank.

[0015] As an optimization and / or instantiation of the combined corrosive liquid storage device of the first aspect mentioned above, the two ends of each column are respectively installed on the bottom plate and top plate of the prefabricated storage tank by hot-melt welding.

[0016] As an optimization and / or instantiation of the combined corrosive liquid storage device of the first aspect mentioned above, the prefabricated storage tank is a rectangular tank, in which the sleeves and tie rods inside the rectangular tank are all arranged in the same direction, or a portion of the sleeves and tie rods inside the rectangular tank are perpendicular to the remaining sleeves and tie rods.

[0017] Secondly, a catalytic flue gas desulfurization device is provided, comprising: a desulfurization reaction system including at least one desulfurization reactor, each desulfurization reactor having an inlet for flue gas to be desulfurized, an outlet for desulfurized flue gas, a outlet for 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, flue gas enters the desulfurization reactor from the inlet for flue gas to be desulfurized, then passes through the desulfurization catalyst for desulfurization, and is then discharged from the outlet for desulfurized flue gas. Sulfur dioxide in the flue gas reacts on the desulfurization catalyst to form sulfuric acid when passing through it, and the desulfurization catalyst is washed and regenerated during this process. Sulfuric acid enters the desulfurization catalyst regeneration liquid and is discharged from the desulfurization catalyst regeneration liquid outlet; the regeneration liquid circulation system includes at least one regeneration liquid tank and a regeneration liquid circulation control network connecting the at least one regeneration liquid tank and each desulfurization reactor. The regeneration liquid circulation control network has an output-side control network, an input-side control network, and a regeneration liquid driving device. The output-side control network can guide the regeneration liquid in the selected regeneration liquid tank into the regeneration liquid spray device of the selected desulfurization reactor. The input-side control network can guide the regeneration liquid output from the outlet of the selected desulfurization reactor into the selected regeneration liquid tank. The regeneration liquid driving device can provide the required power to the regeneration liquid; wherein, at least one regeneration liquid tank adopts the combined corrosive liquid storage device of the first aspect described above.

[0018] As an optimization and / or instantiation of the catalytic flue gas desulfurization device of the second aspect above, the catalytic flue gas desulfurization device further includes: a vertical row of desulfurization reactors, comprising at least two desulfurization reactors respectively installed on support platforms on different floors of a frame-type support structure in a vertical arrangement; 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; and 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.

[0019] The prefabricated storage tank body is made of corrosion-resistant thermoplastic polymer, ensuring excellent corrosion resistance on surfaces in direct contact with corrosive liquids. Internally installed sleeves made of corrosion-resistant thermoplastic polymer are sealed to the side walls of the prefabricated storage tank, providing installation space and corrosion protection for subsequent tie rods. The outer frame in the support structure provides overall support for the prefabricated storage tank, while tie rods installed within the outer frame pass through corresponding sleeves and connect to the opposite side walls of the outer frame, forming a highly efficient load-bearing system that significantly enhances the structural stability and load-bearing capacity of the prefabricated storage tank. 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 enables 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 regeneration liquid tanks in catalytic flue gas desulfurization units.

[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 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 combined corrosive liquid storage device, characterized by: include: 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.

2. A combined corrosive liquid storage device as claimed in claim 1, 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.

3. A combined corrosive liquid storage device as claimed in claim 1, characterized in that: The outer frame is a steel frame.

4. A combination corrosive liquid storage device as defined in claim 1, wherein: 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.

5. The combination corrosive liquid storage apparatus of claim 1, wherein: The sidewalls of the prefabricated storage tank are connected to the casing by hot-melt welding.

6. A combination corrosive liquid storage device as defined in claim 1, wherein: The prefabricated storage tank is equipped with columns made of corrosion-resistant thermoplastic polymer, with each column having its two ends installed on the bottom and top plates of the prefabricated storage tank, respectively.

7. A combined corrosive liquid storage device as claimed in claim 6, characterized in that: The two ends of each column are installed on the bottom plate and top plate of the prefabricated storage tank by hot-melt welding.

8. A combined corrosive liquid storage device according to any one of claims 1-7, characterized in that: The prefabricated storage tank is a rectangular tank, and the sleeves and tie rods inside the rectangular tank are all set in the same direction, or a part of the sleeves and tie rods inside the rectangular tank are perpendicular to the sleeves and tie rods of the rest.

9. A catalytic flue gas desulfurization device, comprising: A desulfurization reaction system includes at least one desulfurization reactor. Each desulfurization reactor has an inlet for flue gas to be desulfurized, an outlet for desulfurized flue gas, a outlet for 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, flue gas enters the desulfurization reactor from the inlet for flue gas to be desulfurized, then passes through the desulfurization catalyst for desulfurization, and is then discharged from the outlet for desulfurized flue gas. When 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, sulfuric acid enters the desulfurization catalyst regeneration liquid and is discharged from the desulfurization catalyst regeneration liquid outlet. 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 into 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 into the selected regenerated liquid tank. The regenerated liquid driving device can provide the required power to the regenerated liquid. Its features are: At least one regeneration tank employs a combined corrosive liquid storage device as described in any one of claims 1-8.

10. A catalytic flue gas desulfurization device according to claim 9, characterized in that: It includes: The desulfurization reactors are arranged in a vertical row, comprising at least two desulfurization reactors that are vertically installed on support platforms on different floors of a frame-type support structure. The intake network includes a vertically arranged main intake pipe and branch intake pipes that connect the main intake pipe to the intake ports of each desulfurization reactor. The exhaust network includes a vertically arranged main exhaust pipe and exhaust branch pipes that connect the main exhaust pipe to the exhaust ports of each desulfurization reactor.

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