A high-purity hydrogen bromide flue gas recycling device

Abstract

The utility model discloses a kind of high-purity hydrogen bromide flue gas recycling devices, it is related to hydrogen bromide waste gas recovery technical field, the utility model includes primary packing tower, water chiller, secondary packing tower and neutralization tower, primary packing tower and secondary packing tower include tower body;And first support grating is connected in tower body inside, the bottom of first support grating is connected with guide vane, the top of first support grating is connected with second support grating.The utility model is through the setting of first through-hole, second through-hole and guide vane, first through-hole corresponds the center area of flue gas column, and second through-hole corresponds the peripheral area of flue gas column, multiple first through-holes are distributed with high density and small aperture, so as to form the flow rate of resistance-reducing center flue gas, multiple second through-holes are distributed with high density and large aperture reduce the resistance generated to peripheral flue gas;Solve the uneven distribution problem that traditional packing tower center flow speed is fast, edge flow speed is slow.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen bromide waste gas recovery technology, specifically a high-purity hydrogen bromide flue gas recovery and utilization device. Background Technology

[0002] Waste wind turbine fiberglass blades, waste resin, and waste circuit boards contain a large amount of bromine. The incineration process produces hydrogen bromide. After pretreatment such as dust removal, the hydrogen bromide flue gas can be recovered by absorption. If the hydrogen bromide in the flue gas is absorbed by alkaline solution, a bromide salt solution is generated; if it is absorbed by sodium bromide solution, a hydrogen bromide solution is generated; if it is absorbed by water, a hydrobromic acid solution is generated. The hydrobromic acid solution can be sold directly as a product or used in downstream processes, such as the synthesis of pharmaceutical and pesticide intermediates, catalysts, and alkylation.

[0003] Existing high-purity hydrogen bromide flue gas recovery and utilization devices typically employ packed towers to absorb hydrogen bromide from the flue gas. The packing material allows for sufficient contact between the flue gas and water, resulting in a high absorption rate and a higher purity hydrobromic acid solution. This reduces hydrogen bromide leakage. After secondary absorption, the hydrogen bromide content in the flue gas becomes negligible. Finally, the flue gas is washed and neutralized with alkaline solution in a neutralization tower, thus completing the purification of the flue gas and enabling it to meet emission standards.

[0004] However, packed towers have the following problems in actual operation: flue gas flows from bottom to top to form a flue gas column. The flue gas on the periphery will rub against the inner wall of the tower to form resistance, resulting in a phenomenon where the flow velocity is slow at the periphery and fast at the center. The high flow velocity in the central area leads to excessive local absorption load and insufficient absorption of hydrogen bromide; while the slow flow velocity and low flow rate in the peripheral area result in insufficient participation of cooling water in absorption, causing waste. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a high-purity hydrogen bromide flue gas recovery and utilization device to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-purity hydrogen bromide flue gas recovery and utilization device, comprising a primary packed tower, a chiller, a secondary packed tower, and a neutralization tower. The primary and secondary packed towers each include a tower body; a first supporting grid plate is connected inside the tower body, a guide plate is connected to the bottom of the first supporting grid plate, and a second supporting grid plate is connected to the top of the first supporting grid plate. First and second through holes are provided on both sides of the top of the second supporting grid plate, the first supporting grid plate, and the guide plate. Cooling channels are provided on both sides of the second supporting grid plate and both sides of the first supporting grid plate. Cooling pipes are connected to both sides of the cooling channels via sealing sleeves, and a butt flange and a mounting flange are respectively fitted onto the outside of the cooling pipes.

[0007] By adopting the above technical solution, the flue gas passes through a guide plate, a first support grid, and a second support grid in sequence before passing through the low-temperature resistant packing. The first through hole corresponds to the central area of ​​the flue gas column, while the second through hole corresponds to the outer area of ​​the flue gas column. The high density and small diameter of the multiple first through holes create resistance, reducing the flow velocity of the central flue gas. The high density and large diameter of the multiple second through holes reduce the resistance to the outer flue gas. At the same time, the inverted conical guide plate uses its inclined surface to guide the central flue gas to diffuse outwards, causing some of the central flue gas to flow outwards. This makes the flue gas more evenly distributed before entering the low-temperature resistant packing, allowing the cooling water to more fully absorb the hydrogen bromide in the flue gas. In addition, a chiller works in conjunction with the cooling channel, indirectly contacting the flue gas through the first and second support grids to cool the cooling water. Meanwhile, the serpentine cooling channel extends the cooling path, improving heat exchange efficiency and quickly removing the heat released during the absorption of hydrogen bromide. This slows down the decrease in absorption efficiency caused by the increase in temperature of the cooling water. Together with the evenly distributed flue gas, it further improves the absorption efficiency.

[0008] Furthermore, the guide plate is in the shape of an inverted cone.

[0009] By adopting the above technical solution, the inverted conical guide plate uses its inclined surface to guide the central flue gas to diffuse in all directions, causing some of the central flue gas to flow to the periphery.

[0010] Furthermore, multiple first through holes and multiple second through holes are provided, and the multiple first through holes are distributed in a rectangular array.

[0011] By adopting the above technical solution, the airflow passage area is increased and the airflow resistance is reduced by increasing the number of first and second through holes.

[0012] Furthermore, the length and width of the first through hole are smaller than the length and width of the second through hole.

[0013] By adopting the above technical solution, the first through hole corresponds to the central region of the flue gas column, while the second through hole corresponds to the outer region of the flue gas column. The multiple first through holes have a high distribution density and small aperture, thus forming resistance to reduce the flow velocity of the central flue gas. The multiple second through holes have a high distribution density and large aperture, reducing the resistance generated to the outer flue gas.

[0014] Furthermore, the sealing sleeve is connected between the tower body, the first support grid plate, the second support grid plate, and the cooling pipe.

[0015] By adopting the above technical solution, the presence of the sealing sleeve can fill the gaps between the cooling pipe and the tower body, the first support grid plate and the second support grid plate, preventing hydrogen bromide flue gas and hydrobromic acid solution from entering the cooling channel, or preventing cold fluid in the cooling channel from entering the tower body, ensuring that the cooling system and the absorption system operate independently and avoiding cross-contamination.

[0016] Furthermore, the cooling channel is serpentine, and the corners of the cooling channel are rounded.

[0017] By adopting the above technical solution, the cooling channel extends the cooling path in a serpentine shape, improving heat exchange efficiency and quickly removing the heat released during the absorption of hydrogen bromide.

[0018] Furthermore, the second support grid plate is fixedly connected to the first support grid plate by welding, and the guide plate is fixedly connected to the first support grid plate by integral molding or welding.

[0019] By adopting the above technical solution, the traditional integrated support grid is changed to a two-part combined structure, namely, the first support grid and the second support grid are welded and fixed together. This makes it easier to open a serpentine cooling channel inside the support grid to improve heat exchange efficiency. Since the guide plate does not need to open a cooling channel, it can be integrally formed with the first support grid or welded and fixed later.

[0020] Furthermore, both the primary and secondary packed towers include a manhole installed on the outer surface of the tower body, an air inlet connected to the lower side of one side of the tower body, a gas distributor communicating with the air inlet, low-temperature resistant packing connected to the top of the second support grid, a packing limiter connected to the top of the low-temperature resistant packing, a redistributor connected to the interior of the tower body, a liquid inlet connected to the upper side of one side of the tower body, a liquid distributor communicating with the liquid inlet, a demister connected to the upper interior of the tower body, an air outlet connected to the top of the tower body, and a liquid outlet connected to the lower side of the other side of the tower body.

[0021] By adopting the above technical solution, during absorption operations in the primary and secondary packed towers, hydrogen bromide flue gas enters the tower body through the inlet and gas distributor and is evenly distributed. The flue gas then flows upwards through the low-temperature resistant packing, redistributor, and demister before exiting through the outlet. A chiller inputs low-temperature cooling water into the tower body through the liquid inlet and liquid distributor, and the cooling water is evenly distributed. The cooling water flows downwards, passing through the low-temperature resistant packing and redistributor before exiting through the liquid outlet, forming convection with the hydrogen bromide flue gas. The presence of the low-temperature resistant packing significantly increases the contact area between the hydrogen bromide flue gas and the low-temperature cooling water. This gas-liquid convection, combined with the increased contact area from the low-temperature resistant packing, significantly improves the hydrobromic acid generation efficiency.

[0022] Furthermore, the first support grid, the second support grid, and the guide plate are all made of duplex stainless steel or C276 Hastelloy, and the sealing sleeve is made of FFKM material.

[0023] By adopting the above technical solutions, duplex stainless steel is a low-cost alternative. Its corrosion resistance is lower than that of C276 Hastelloy, but its cost is also much lower than that of C276 Hastelloy. It is suitable for use in secondary packed towers. C276 Hastelloy has good corrosion resistance and oxidation resistance and can work in primary packed towers for a long time. FFKM sealing sleeves can also avoid corrosion by hydrogen bromide or hydrobromic acid.

[0024] Furthermore, two chillers are provided, and the two chillers are connected to the liquid inlet and the cooling pipe respectively through insulated pipes.

[0025] By adopting the above technical solution, an additional chiller is added to form a cold fluid circulation with the cooling channel, ensuring that the water flow in the cooling channel can meet the usage requirements, thereby ensuring the cooling effect of the cooling water and avoiding the impact on the use of cooling water and cold fluid caused by the high water pressure of a single chiller.

[0026] In summary, the present invention has the following main advantages:

[0027] 1. This utility model, through the arrangement of a first through hole, a second through hole, and a guide plate, with the first through hole corresponding to the central region of the flue gas column and the second through hole corresponding to the outer region of the flue gas column, achieves a high distribution density and small diameter of multiple first through holes, thus creating resistance to reduce the flow velocity of the central flue gas. The high distribution density and large diameter of multiple second through holes further reduce resistance to the outer flue gas. Simultaneously, the inverted conical guide plate uses its inclined surface to guide the central flue gas to diffuse outwards, causing some of the central flue gas to flow outwards. This results in a more uniform distribution of flue gas before it enters the low-temperature resistant packing, allowing the cooling water to more fully absorb hydrogen bromide from the flue gas. It significantly improves the uniformity of the hydrobromic acid solution concentration, reduces cooling water waste and hydrogen bromide escape, and solves the problem of uneven distribution in traditional packed towers where the flow velocity is high at the center and slow at the edges.

[0028] 2. This utility model, through the design of a cooling channel, works in conjunction with a chiller to cool the cooling water after it comes into contact with the flue gas. Simultaneously, the serpentine cooling channel extends the cooling path, improving heat exchange efficiency and quickly removing the heat released during hydrogen bromide absorption. This mitigates the decrease in absorption efficiency caused by the cooling water's temperature rise. Combined with the evenly distributed flue gas, it further enhances absorption efficiency. It can cool the cooling water after absorbing hydrogen bromide within the tower, mitigating the decrease in absorption efficiency caused by high temperatures, thereby improving absorption efficiency.

[0029] 3. This utility model, through the arrangement of a first support grid plate, a second support grid plate, cooling pipes, a connecting flange, a mounting flange, and a sealing sleeve, transforms the traditional integrated support grid plate into a two-part combined structure. Specifically, the first and second support grid plates are welded and fixed, facilitating the creation of a serpentine cooling channel within the support grid plate to improve heat exchange efficiency. The cooling pipes are connected to the chiller's insulated pipes via the connecting flange, allowing the cold fluid in the cooling channel to circulate continuously within the cooling channel and chiller, continuously cooling the cooling water inside the tower. The mounting flange ensures a stable connection between the cooling pipes and the tower body, the first support grid plate, and the second support grid plate, preventing the cooling pipes from loosening or falling off. The sealing sleeve fills the gaps between the cooling pipes and the tower body, the first support grid plate, and the second support grid plate, preventing hydrogen bromide fumes and hydrobromic acid solution from entering the cooling channel, or preventing the cold fluid in the cooling channel from entering the tower body, ensuring independent operation of the cooling system and the absorption system, avoiding cross-contamination, and improving the stability of the structure's operation. Attached Figure Description

[0030] Figure 1 This is a flowchart illustrating the recycling process of this utility model;

[0031] Figure 2 This is a schematic cross-sectional view of the primary packed tower of this utility model;

[0032] Figure 3 This is a schematic diagram of the second support grid structure of this utility model;

[0033] Figure 4 This is a schematic diagram of the cross-sectional structure of the first support grid of this utility model;

[0034] Figure 5 This is a schematic diagram of the first supporting grid structure of this utility model;

[0035] Figure 6 This is a bottom view of the second support grid structure of this utility model.

[0036] In the diagram: 1. Primary packed tower; 101. Tower body; 102. Air inlet; 103. Gas distributor; 104. Low-temperature packing; 105. Redistributor; 106. Liquid inlet; 107. Liquid distributor; 108. Demister; 109. Air outlet; 110. Liquid outlet; 111. First support grid; 112. Second support grid; 113. Guide plate; 114. First through hole; 115. Second through hole; 116. Cooling pipe; 117. Connecting flange; 118. Mounting flange; 119. Sealing sleeve; 120. Cooling channel; 2. Chiller; 3. Secondary packed tower; 4. Neutralization tower. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] The embodiments of this utility model will be described below based on its overall structure.

[0039] Example 1:

[0040] A high-purity hydrogen bromide flue gas recovery and utilization device, such as Figures 1-6As shown, the system includes a primary packed tower 1, a chiller 2, a secondary packed tower 3, and a neutralization tower 4. The primary packed tower 1 and the secondary packed tower 3 each include a tower body 101. A first support grid 111 is connected inside the tower body 101. A guide plate 113 is connected to the bottom of the first support grid 111. The guide plate 113 is fixedly connected to the first support grid 111 by integral molding or welding. The guide plate 113 is in the shape of an inverted cone. A second support grid 112 is connected to the top of the first support grid 111. The second support grid 112 is fixedly connected to the first support grid 111 by welding. The second support grid 112, the first support grid 111, and... The top two sides of the guide plate 113 are provided with first through holes 114 and second through holes 115. Multiple first through holes 114 and second through holes 115 are provided, and the multiple first through holes 114 are distributed in a rectangular array. The length and width of the first through holes 114 are smaller than the length and width of the second through holes 115. Cooling channels 120 are provided on both sides of the second support grid plate 112 and both sides of the first support grid plate 111. The cooling channels 120 are serpentine, with rounded corners. Cooling pipes 116 are connected to both sides of the cooling channels 120 via sealing sleeves 119. The sealing sleeves 119 are connected to the tower body 101, the first support grid plate 111, and the second support grid plate 112. Between the support grid plate 112 and the cooling pipe 116, a docking flange 117 and a mounting flange 118 are respectively sleeved on the outside of the cooling pipe 116. Before the flue gas passes through the low-temperature resistant packing 104, it will pass through the guide plate 113, the first support grid plate 111, and the second support grid plate 112 in sequence. The first through hole 114 corresponds to the central area of ​​the flue gas column, while the second through hole 115 corresponds to the outer area of ​​the flue gas column. The multiple first through holes 114 have a high distribution density and small aperture, thus forming resistance to reduce the flow velocity of the central flue gas. The multiple second through holes 115 have a high distribution density and large aperture, reducing the resistance generated to the outer flue gas. At the same time, the inverted conical guide plate 113 is advantageous. Its inclined surface guides the central flue gas to diffuse outwards, causing some of the central flue gas to flow to the periphery; this makes the flue gas more evenly distributed before entering the low-temperature resistant packing 104, allowing the cooling water to more fully absorb the hydrogen bromide in the flue gas; at the same time, a chiller 2 works in conjunction with the cooling channel 120, indirectly contacting the flue gas through the first support grid 111 and the second support grid 112 to cool the cooling water; simultaneously, the cooling channel 120 extends the cooling path in a serpentine shape, improving heat exchange efficiency and quickly removing the heat released during the absorption of hydrogen bromide; this mitigates the decrease in absorption efficiency caused by the increase in cooling water temperature; and in conjunction with the evenly distributed flue gas, it further improves the absorption efficiency.

[0041] See Figure 1 and Figure 2In the above embodiments, both the primary packed tower 1 and the secondary packed tower 3 include a manhole installed on the outer surface of the tower body 101, an air inlet 102 connected to the lower side of one side of the tower body 101, a gas distributor 103 communicating with the air inlet 102, low-temperature resistant packing 104 connected to the top of the second support grid plate 112, a packing limiter connected to the top of the low-temperature resistant packing 104, a redistributor 105 connected to the inside of the tower body 101, a liquid inlet 106 connected to the upper side of one side of the tower body 101, a liquid distributor 107 communicating with the liquid inlet 106, a demister 108 connected to the upper inside of the tower body 101, an air outlet 109 connected to the top of the tower body 101, and a liquid outlet 110 connected to the lower side of the other side of the tower body 101. When tower 3 is performing absorption operations, hydrogen bromide flue gas enters the interior of tower body 101 through inlet 102 and gas distributor 103 and is evenly distributed. Then, the flue gas flows upward through low-temperature resistant packing 104, redistributor 105 and demister 108 and is discharged from outlet 109. Chiller 2 inputs low-temperature cooling water into tower body 101 through liquid inlet 106 and liquid distributor 107. The cooling water is evenly distributed and flows downward through low-temperature resistant packing 104 and redistributor 105 and is discharged from outlet 110, forming convection with hydrogen bromide flue gas. The presence of low-temperature resistant packing 104 significantly increases the contact area between hydrogen bromide flue gas and low-temperature cooling water. Gas-liquid convection combined with low-temperature resistant packing 104 increases the contact area to significantly improve the hydrobromic acid generation efficiency.

[0042] Example 2:

[0043] Based on the above embodiment one, in order to avoid the structure being corroded by hydrogen bromide or hydrobromic acid, the following settings are now adopted.

[0044] See Figures 2-6 In the above embodiments, the first support grid 111, the second support grid 112, and the guide plate 113 are all made of duplex stainless steel or C276 Hastelloy. Duplex stainless steel is a low-cost alternative. Its corrosion resistance is lower than that of C276 Hastelloy, but its cost is also much lower than that of C276 Hastelloy. It is suitable for use in the secondary packed tower 3. C276 Hastelloy has good corrosion resistance and oxidation resistance and can work in the primary packed tower 1 for a long time. The sealing sleeve 119 is made of FFKM material, which can avoid corrosion by hydrogen bromide or hydrobromic acid.

[0045] Example 3:

[0046] Based on the above embodiment one, in order to meet the water demand of the cooling channel, the following settings are now adopted.

[0047] See Figure 1In the above embodiment, two chillers 2 are provided. The two chillers 2 are connected to the liquid inlet 106 and the cooling pipe 116 respectively through insulated pipes. The additional chiller 2 forms a cold fluid circulation with the cooling channel 120, ensuring that the water flow of the cooling channel 120 can meet the usage requirements, thereby ensuring the cooling effect of the cooling water and avoiding the impact of high water pressure from a single chiller 2 on the use of cooling water and cold fluid.

[0048] The implementation principle of this utility model is as follows: First, hydrogen bromide flue gas is pretreated by dust removal to obtain high-purity hydrogen bromide flue gas. The high-purity hydrogen bromide flue gas enters the primary packed tower 1 and contacts cooling water, allowing the cooling water to absorb hydrogen bromide and obtain a high-purity hydrobromic acid solution. Then, flue gas with a small amount of residual hydrogen bromide enters the secondary packed tower 3 and reacts with cooling water. Alternatively, since the hydrogen bromide concentration is low, low-temperature enhanced absorption is not required, and room temperature water can be used to reduce energy consumption. Furthermore, due to the reduced concentration of hydrogen bromide in the flue gas, the secondary packed tower 3 generates a dilute hydrobromic acid solution. That is, the hydrobromic acid solution obtained has a higher water content and a correspondingly lower hydrobromic acid concentration. Finally, flue gas with trace amounts of residual hydrogen bromide enters the neutralization tower 4 and reacts with alkaline solution to complete purification, and a small amount of bromide salt solution is obtained. The purified gas meets the emission standards and can be discharged.

[0049] During absorption operations in the primary packed tower 1 and the secondary packed tower 3, hydrogen bromide flue gas enters the tower body 101 through the inlet 102 and the gas distributor 103 and is evenly distributed. Then, the flue gas flows upward through the low-temperature resistant packing 104, the redistributor 105, and the demister 108 and is discharged from the outlet 109. The chiller 2 inputs low-temperature cooling water into the tower body 101 through the liquid inlet 106 and the liquid distributor 107, and the cooling water is evenly distributed. The cooling water flows downward through the low-temperature resistant packing 104 and the redistributor 105 and is discharged from the liquid outlet 110, forming convection with the hydrogen bromide flue gas. The presence of the low-temperature resistant packing 104 significantly increases the contact area between the hydrogen bromide flue gas and the low-temperature cooling water. The gas-liquid convection combined with the low-temperature resistant packing 104 increases the contact area to significantly improve the hydrobromic acid generation efficiency.

[0050] Before passing through the low-temperature resistant packing 104, the flue gas passes sequentially through the guide plate 113, the first support grid 111, and the second support grid 112. The first through hole 114 corresponds to the central region of the flue gas column, while the second through hole 115 corresponds to the outer region of the flue gas column. The multiple first through holes 114 have a high distribution density and small diameter, thus forming resistance to reduce the flow velocity of the central flue gas. The multiple second through holes 115 have a high distribution density and large diameter, reducing the resistance to the outer flue gas. At the same time, the inverted conical guide plate 113 uses its inclined surface to guide the central flue gas to diffuse outwards, allowing some of the central flue gas to diffuse outwards. The flue gas flows outwards, making it more evenly distributed before entering the low-temperature packing 104, allowing the cooling water to more fully absorb hydrogen bromide from the flue gas. Simultaneously, a chiller 2 works in conjunction with the cooling channel 120, indirectly contacting the flue gas through the first support grid 111 and the second support grid 112 to cool the cooling water. The cooling channel 120 also extends the cooling path in a serpentine pattern, improving heat exchange efficiency and quickly removing the heat released during hydrogen bromide absorption. This mitigates the decrease in absorption efficiency caused by the increased temperature of the cooling water. Together with the evenly distributed flue gas, this further enhances absorption efficiency.

[0051] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A high-purity hydrogen bromide flue gas recovery and utilization device, comprising a primary packed tower (1), a chiller (2), a secondary packed tower (3), and a neutralization tower (4), characterized in that: The primary packed tower (1) and the secondary packed tower (3) include a tower body (101); and a first support grid plate (111) is connected inside the tower body (101). A guide plate (113) is connected to the bottom of the first support grid plate (111), and a second support grid plate (112) is connected to the top of the first support grid plate (111). A first through hole (114) and a second through hole (115) are provided on both sides of the top of the second support grid plate (112), the first support grid plate (111), and the guide plate (113). Cooling channels (120) are provided on both sides of the second support grid plate (112) and both sides of the first support grid plate (111). Cooling pipes (116) are connected to both sides of the cooling channels (120) through sealing sleeves (119). A docking flange (117) and an installation flange (118) are respectively sleeved on the outside of the cooling pipes (116).

2. The high-purity hydrogen bromide flue gas recovery and utilization device according to claim 1, characterized in that: The guide plate (113) is in the shape of an inverted cone.

3. The high-purity hydrogen bromide flue gas recovery and utilization device according to claim 1, characterized in that: Multiple first through holes (114) and multiple second through holes (115) are provided, and the multiple first through holes (114) are distributed in a rectangular array.

4. The high-purity hydrogen bromide flue gas recovery and utilization device according to claim 3, characterized in that: The length and width of the first through hole (114) are smaller than the length and width of the second through hole (115).

5. The high-purity hydrogen bromide flue gas recovery and utilization device according to claim 1, characterized in that: The sealing sleeve (119) is connected between the tower body (101), the first support grid plate (111), the second support grid plate (112), and the cooling pipe (116).

6. The high-purity hydrogen bromide flue gas recovery and utilization device according to claim 1, characterized in that: The cooling channel (120) is serpentine, and the corners of the cooling channel (120) are rounded.

7. The high-purity hydrogen bromide flue gas recovery and utilization device according to claim 1, characterized in that: The second support grid plate (112) is fixedly connected to the first support grid plate (111) by welding, and the guide plate (113) is fixedly connected to the first support grid plate (111) by integral molding or welding.

8. The high-purity hydrogen bromide flue gas recovery and utilization device according to claim 1, characterized in that: Both the primary packed tower (1) and the secondary packed tower (3) include a manhole installed on the outer surface of the tower body (101), an air inlet (102) connected to the lower side of one side of the tower body (101), a gas distributor (103) communicating with the air inlet (102), a low-temperature resistant packing (104) connected to the top of the second support grid (112), a packing limiter connected to the top of the low-temperature resistant packing (104), a redistributor (105) connected to the inside of the tower body (101), a liquid inlet (106) connected to the upper side of one side of the tower body (101), a liquid distributor (107) communicating with the liquid inlet (106), a demister (108) connected to the upper inside of the tower body (101), an air outlet (109) connected to the top of the tower body (101), and a liquid outlet (110) connected to the lower side of the other side of the tower body (101).

9. The high-purity hydrogen bromide flue gas recovery and utilization device according to claim 1, characterized in that: The first support grid plate (111), the second support grid plate (112) and the guide plate (113) are all made of duplex stainless steel or C276 Hastelloy, and the sealing sleeve (119) is made of FFKM material.

10. The high-purity hydrogen bromide flue gas recovery and utilization device according to claim 8, characterized in that: Two chillers (2) are provided, and the two chillers (2) are connected to the liquid inlet (106) and the cooling pipe (116) respectively through insulated pipes.

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