Catalytic flue gas desulfurization device

Abstract

The utility model discloses a catalytic flue gas desulfurization device, solve the prior art in the main beam end head of adopting by paving acid -resistant brick and form the secondary beam end head of putting in the flange when easy leading to the main beam layer and the secondary beam layer installation unbalanced support or local stress concentration technical problem that appears. The inside wall of desulfurization reactor is equipped with the main beam support boss that is integrally formed by the concrete pouring with the inside wall, and the main beam layer is supported on the column layer and the main beam support boss simultaneously. The main beam support boss is integrally formed by the concrete pouring with the inside wall of desulfurization reactor, and is not the mode of adopting later paving acid -resistant brick to form the support structure, so as to guarantee the accurate levelness and elevation consistency of main beam support boss, avoid the problem that the main beam layer installation unbalanced support or local stress concentration appears.

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] Patent document CN117547962A discloses (see paragraphs 0151-0152 of the specification, Figures 14-15): A catalytic flue gas desulfurization device includes: a desulfurization reactor, the desulfurization reactor having 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 provided 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. The reactor then desulfurizes the flue gas using a desulfurization catalyst before discharging it from the desulfurized flue gas exhaust port. The sulfur dioxide in the flue gas reacts with 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 discharged from the desulfurization catalyst regeneration liquid outlet. The interior of the desulfurization reactor is divided from bottom to top into a flue gas distribution layer to be desulfurized, a desulfurization catalyst placement layer, and a desulfurized flue gas overflow layer. The flue gas distribution layer to be desulfurized is equipped with a gas distribution support structure, and the desulfurization catalyst is placed in the desulfurization catalyst placement layer above the gas distribution support structure. During desulfurization, flue gas enters the flue gas distribution layer from the inlet of the flue gas to be desulfurized, and then, through the desulfurization catalyst, disperses upwards via the gas distribution support structure 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 comprises 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 spaced main beams. The secondary beam layer is erected on the main beam layer and includes multiple spaced secondary beams. The desulfurization catalyst... A load-bearing layer, made of breathable material, is laid on the secondary beam layer and used to place the desulfurization catalyst. The inner wall of the desulfurization reactor is provided with main beam end overlapping inner flanges and secondary beam end overlapping inner flanges. Both the main beam end overlapping inner flanges and the secondary beam end overlapping inner flanges are formed by first acid-resistant bricks laid on the wall surface. The main beam ends near the inner wall of the desulfurization reactor in the main beam layer overlap the corresponding positions of the main beam end overlapping inner flanges, and the secondary beam ends near the inner wall of the desulfurization reactor in the secondary beam layer overlap the corresponding positions of the secondary beam end overlapping inner flanges. In the aforementioned catalytic flue gas desulfurization device, the first acid-resistant bricks laid on the inner wall of the desulfurization reactor form the inner flanges at the ends of the main beam and the secondary beam, which helps to simplify the internal structure of the desulfurization reactor, facilitates the construction of the desulfurization reactor, ensures the installation stability of the main beam and the secondary beam, and also helps to reduce the overall weight of the desulfurization reactor.However, the existing technology using inner flanges at the ends of main beams and secondary beams formed by laying acid-resistant bricks has the following drawbacks in construction and use: Because the acid-resistant brick laying process relies on manual operation, it is difficult to guarantee the precise levelness and consistent elevation of the inner flanges at the ends of the main and secondary beams, which can easily lead to unbalanced support or localized stress concentration during the installation of the main and secondary beam layers. Furthermore, the acid-resistant bricks are mainly fixed to the inner wall of the desulfurization reactor using adhesives. Under long-term loads from the main and secondary beam layers, as well as the weight of the desulfurization catalyst in the upper catalyst placement layer, the adhesive joints are prone to loosening or detachment, affecting the stability and safety of the gas distribution support structure. Utility Model Content

[0004] The present invention aims to provide a catalytic flue gas desulfurization device to solve the technical problem in the prior art that when the main beam end is formed by laying acid-resistant bricks and the secondary beam end is formed by placing inner flanges, it is easy to cause unbalanced support or local stress concentration during the installation of the main beam layer and the secondary beam layer.

[0005] To address this, a catalytic flue gas desulfurization device is provided, comprising: a desulfurization reactor, constructed of concrete, 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 within the reactor; the desulfurization reactor is equipped with a desulfurization catalyst regeneration liquid spraying device for washing and regenerating the desulfurization catalyst in the loading space; during desulfurization, flue gas enters the desulfurization reactor from the inlet for the flue gas to be desulfurized, passes through the desulfurization catalyst for desulfurization, and then exits from the outlet for the desulfurized flue gas. Sulfur dioxide in the flue gas reacts on the desulfurization catalyst to form sulfuric acid when passing through it. During the washing and regeneration of the desulfurization catalyst, sulfuric acid enters the desulfurization catalyst regeneration liquid and exits from the outlet for the desulfurization catalyst regeneration liquid; the interior of the desulfurization reactor is divided from bottom to top into a flue gas distribution layer for the flue gas to be desulfurized, a desulfurization catalyst placement layer, and a desulfurized flue gas overflow layer. The flue gas distribution layer is equipped with a gas distribution support structure. The desulfurization catalyst is placed in the desulfurization catalyst placement layer above the gas 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 desulfurization catalyst through the gas distribution support structure from bottom to top, and enters the desulfurized flue gas overflow layer and is discharged 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 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 breathable material for placing the desulfurization catalyst. The inner wall of the desulfurization reactor is provided with a main beam support boss that is integrally cast with concrete. The main beam layer is supported on both the column layer and the main beam support boss.

[0006] As an optimization and / or instantiation of the above-mentioned catalytic flue gas desulfurization device, further: a secondary beam support boss is supported on the main beam support boss, and the secondary beam layer is supported on both the main beam layer and the secondary beam support boss.

[0007] As an optimization and / or instantiation of the above-mentioned catalytic flue gas desulfurization device, further: the secondary beam support boss is constructed by using acid-resistant bricks on the main beam support boss.

[0008] As an optimization and / or instantiation of the above-mentioned catalytic flue gas desulfurization device, further: the main beam support boss is arranged circumferentially around the inner wall of the desulfurization reactor.

[0009] As an optimization and / or instantiation of the above-mentioned catalytic flue gas desulfurization device, further: the surface of the main beam support boss is provided with an anti-corrosion material layer.

[0010] As an optimization and / or instance of the above-mentioned catalytic flue gas desulfurization device, further: the anti-corrosion material layer is formed by laying acid-resistant bricks.

[0011] As an optimization and / or instantiation of the above-mentioned catalytic flue gas desulfurization device, further: the cross-section of the main beam support boss is a first right-angled triangle, and the two straight sides of the first right-angled triangle serve as the top surface of the main beam support boss and the side connected to the inner wall of the desulfurization reactor, respectively.

[0012] As an optimization and / or instantiation of the above-mentioned catalytic flue gas desulfurization device, further: a secondary beam support boss is provided on the inner wall of the desulfurization reactor above the main beam support boss, which is integrally cast with concrete and supported by the inner wall. The secondary beam layer is supported on both the main beam layer and the secondary beam support boss.

[0013] As an optimization and / or instantiation of the above-mentioned catalytic flue gas desulfurization device, further: the surface of the secondary beam support boss is provided with an anti-corrosion material layer.

[0014] As an optimization and / or instantiation of the above-mentioned catalytic flue gas desulfurization device, further: the cross-section of the secondary beam support boss is a second right-angled triangle, and the two straight sides of the second right-angled triangle serve as the top surface of the secondary beam support boss and the side connected to the inner wall of the desulfurization reactor, respectively.

[0015] Because the main beam support boss is integrally cast with the inner wall of the desulfurization reactor using concrete, rather than being formed by later paving with acid-resistant bricks, the precise levelness and elevation consistency of the main beam support boss can be guaranteed. This avoids problems such as unbalanced support or localized stress concentration during the installation of the main beam layer. Furthermore, since the main beam support boss and the inner wall of the desulfurization reactor are integrally formed concrete structures without an adhesive interface, there is no risk of loosening or detachment at the adhesive joints when bearing the weight of the main beam layer, secondary beam layer, and the desulfurization catalyst in the upper desulfurization catalyst placement layer over a long period. This significantly improves the stability and safety of the gas distribution support structure.

[0016] 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

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the structure of the catalytic flue gas desulfurization device according to an embodiment of the present invention.

[0019] Figure 2 for Figure 1 The left view of the catalytic flue gas desulfurization device shown.

[0020] The diagram is labeled as follows: Column 1, Main beam 2, Secondary beam 3, Main beam support boss 4, Secondary beam support boss 5. Detailed Implementation

[0021] 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:

[0022] 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.

[0023] 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.

[0024] 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.

[0025] See Figure 1 and Figure 2 This embodiment provides a catalytic flue gas desulfurization device, including a desulfurization reactor constructed of concrete. The reactor 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 within the reactor. The desulfurization reactor is equipped with a desulfurization catalyst regeneration liquid spraying device for washing and regenerating the desulfurization catalyst in the loading space.

[0026] During the desulfurization process, flue gas enters the desulfurization reactor from the inlet of the flue gas to be desulfurized, then passes through the desulfurization catalyst for desulfurization before being discharged from the exhaust outlet of the desulfurized flue gas. When sulfur dioxide in the flue gas passes through the desulfurization catalyst, it reacts on the 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.

[0027] The desulfurization reactor is 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 is placed in the desulfurization catalyst placement layer above the gas distribution support structure. During the desulfurization process, flue gas enters the gas distribution layer from the flue gas inlet, then passes through the desulfurization catalyst in a dispersed manner from bottom to top via the gas distribution support structure, enters the desulfurized flue gas overflow layer, and finally exits from the desulfurized flue gas exhaust port.

[0028] The gas distribution support structure is a multi-layered support system, consisting of a column layer, a main beam layer, a secondary beam layer, and a desulfurization catalyst support layer from bottom to top. The column layer consists of columns 1 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 2 arranged at intervals; the secondary beam layer is erected on the main beam layer and includes multiple secondary beams 3 arranged at intervals; the desulfurization catalyst support layer is laid on the secondary beam layer and is made of permeable material for placing the desulfurization catalyst.

[0029] The core innovation of the catalytic flue gas desulfurization device in this embodiment lies in the fact that the inner wall of the desulfurization reactor is provided with a main beam support boss 4, which is integrally cast with concrete. The main beam layer is supported by both the column layer and the main beam support boss 4. This design ensures that the main beam layer receives more stable support, avoiding the instability that may result from relying solely on the column layer for support.

[0030] The cross-section of the main beam support boss 4 is a right-angled triangle, with its two straight sides serving as the top surface of the main beam support boss 4 and the side connected to the inner wall of the desulfurization reactor, respectively. This triangular structural design not only provides a stable horizontal support surface for supporting the main beam 2, but also optimizes force transmission through the inclined plane, enhancing the overall stability of the structure.

[0031] To further improve the reliability of the support system, the main beam support boss 4 is arranged circumferentially along the inner wall of the desulfurization reactor, forming a continuous annular support structure. Meanwhile, considering the corrosiveness of the desulfurization environment, the surface of the main beam support boss 4 is covered with an anti-corrosion material layer, which is formed by laying acid-resistant bricks to resist sulfuric acid corrosion.

[0032] For the support of the secondary beam layer, this utility model provides two solutions: one is that the secondary beam support boss 5 is supported on the main beam support boss 4, and the secondary beam layer is supported on both the main beam layer and the secondary beam support boss 5. The secondary beam support boss 5 is constructed on the main beam support boss 4 using acid-resistant bricks.

[0033] Another design involves a secondary beam support boss 5, integrally cast with concrete, located above the main beam support boss 4 on the inner wall of the desulfurization reactor. The secondary beam layer supports both the main beam layer and the secondary beam support boss 5. The cross-section of the secondary beam support boss 5 is a second right-angled triangle, with its two straight sides serving as the top surface of the secondary beam support boss 5 and the side connected to the inner wall of the desulfurization reactor, respectively. The surface of the secondary beam support boss 5 is also coated with an anti-corrosion material layer to enhance its corrosion resistance.

[0034] This embodiment adopts the first scheme mentioned above, that is, the secondary beam support boss 5 is supported on the main beam support boss 4, and the secondary beam layer is supported on both the main beam layer and the secondary beam support boss 5. The secondary beam support boss 5 is constructed on the main beam support boss 4 using acid-resistant bricks.

[0035] The first approach involves supporting the secondary beam support boss 5 on the main beam support boss 4. The secondary beam layer is simultaneously supported by both the main beam layer and the secondary beam support boss 5. The secondary beam support boss 5 is constructed using acid-resistant bricks on the main beam support boss 4. The advantage of this approach is its relatively simple construction; the secondary beam support boss 5 is formed simply by laying acid-resistant bricks on the integrally cast main beam support boss 4, eliminating the need to consider the position and shape of the secondary beam support during concrete pouring, thus offering high construction flexibility. However, the disadvantage is that the secondary beam support boss 5 still uses acid-resistant bricks, which to some extent presents bonding interface problems similar to traditional techniques. Although the risk is greatly reduced due to its foundation on the more stable main beam support boss 4, there is still a possibility of the acid-resistant bricks loosening in the long term.

[0036] The second option involves directly installing a secondary beam support boss 5, integrally cast with concrete, on the inner wall of the desulfurization reactor, above the main beam support boss 4. The secondary beam layer is supported by both the main beam layer and the secondary beam support boss 5. The advantage of this option is that the secondary beam support boss 5 and the inner wall of the desulfurization reactor are both integrally cast concrete structures, completely avoiding bonding interface problems and providing the highest level of structural stability and safety. The disadvantage is that it requires higher precision in concrete casting, necessitating accurate consideration of the position and height of the secondary beam support boss 5 during the initial design and construction stages. Once cast, adjustments are difficult, resulting in lower construction flexibility. Furthermore, design or construction deviations may prevent the secondary beam layer from perfectly supporting the secondary beam support boss 5.

[0037] Because the main beam support boss 4 is integrally cast with the inner wall of the desulfurization reactor using concrete, rather than being formed by later paving with acid-resistant bricks, the precise levelness and elevation consistency of the main beam support boss 4 can be guaranteed. This avoids problems such as unbalanced support or localized stress concentration during the installation of the main beam layer. Furthermore, since the main beam support boss 4 and the inner wall of the desulfurization reactor are integrally formed concrete structures without an adhesive interface, there is no risk of loosening or detachment at the adhesive joints when bearing the weight of the main beam layer, secondary beam layer, and the desulfurization catalyst in the upper desulfurization catalyst placement layer over a long period. This significantly improves the stability and safety of the gas distribution support structure.

[0038] 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 is made of concrete and 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. 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 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 breathable material, used to place the desulfurization catalyst. Its features are: The inner wall of the desulfurization reactor is provided with a main beam support boss that is integrally cast with concrete. The main beam layer is supported by both the column layer and the main beam support boss.

2. The catalytic flue gas desulfurization device as described in claim 1, characterized in that: The main beam support boss supports the secondary beam support boss, and the secondary beam layer is supported by both the main beam layer and the secondary beam support boss.

3. The catalytic flue gas desulfurization device as described in claim 2, characterized in that: The secondary beam support boss is constructed by using acid-resistant bricks on the main beam support boss.

4. The catalytic flue gas desulfurization device as described in claim 2, characterized in that: The main beam support boss is arranged circumferentially around the inner wall of the desulfurization reactor.

5. The catalytic flue gas desulfurization device as described in claim 1, characterized in that: The surface of the main beam support boss is covered with an anti-corrosion material layer.

6. The catalytic flue gas desulfurization device as described in claim 5, characterized in that: The anti-corrosion material layer is formed by laying acid-resistant bricks.

7. A catalytic flue gas desulfurization device according to any one of claims 1-6, characterized in that: The cross-section of the main beam support boss is a right-angled triangle, and the two straight sides of the first right-angled triangle serve as the top surface of the main beam support boss and the side connected to the inner wall of the desulfurization reactor, respectively.

8. The catalytic flue gas desulfurization device as described in claim 1, characterized in that: On the inner wall of the desulfurization reactor, above the main beam support boss, there is a secondary beam support boss integrally cast with concrete. The secondary beam layer is supported by both the main beam layer and the secondary beam support boss.

9. A catalytic flue gas desulfurization device as described in claim 8, characterized in that: The surface of the secondary beam support boss is covered with an anti-corrosion material layer.

10. A catalytic flue gas desulfurization device as described in claim 8, characterized in that: The cross-section of the secondary beam support boss is a second right triangle, and the two straight sides of the second right triangle serve as the top surface of the secondary beam support boss and the side connected to the inner wall of the desulfurization reactor, respectively.

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