Fluorinated tail gas treatment device

Abstract

The utility model relates to a fluorination tail gas treatment device which comprises a first spray tower, a second spray tower and a third spray tower, the first spray tower is used for primary treatment, the second spray tower is used for secondary deep treatment, the third spray tower is used for realizing deep purification, and through optimized connection of a first pipeline to a seventh pipeline, the device realizes cyclic utilization of spray liquid, so that the treatment efficiency of the fluorination tail gas is improved. The resource utilization rate is improved, the operation cost is reduced, and the stability and continuity of system operation are guaranteed. A first return pipeline, a second return pipeline and a third return pipeline are arranged on the first spray tower, the second spray tower and the third spray tower, so that an internal liquid circulation mechanism is further optimized, the stability and the reliability of a reaction process are ensured, and the removal efficiency of fluoride in tail gas is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluorination tail gas treatment field especially, and it relates to a fluorination tail gas treatment device. BACKGROUND

[0002] In the existing fluorination tail gas treatment device, the tail gas containing fluoride will enter the absorption tower, fully contact with the absorption liquid (such as alkaline solution), and react chemically to be absorbed. However, due to the limited processing capacity of the current fluorination tail gas treatment device, it is difficult to completely remove the fluoride in the tail gas. Therefore, a certain concentration of fluoride will still remain in the treated tail gas, resulting in low tail gas treatment efficiency and failing to fully meet the increasingly stringent environmental emission standards.

[0003] In addition, the existing treatment device also has other problems in the running process. For example, the concentration of the absorption liquid will gradually increase with the passage of time, which is not conducive to the subsequent reaction and absorption process, and the absorption liquid needs to be replaced regularly. Frequent replacement will increase the operating cost, and also produce a large amount of waste, causing a certain burden to the environment. At the same time, the pipeline and structure design of the existing device are relatively simple, and it is difficult to realize the recycling of the absorption liquid, which also limits the further improvement of the overall treatment efficiency. SUMMARY

[0004] In view of the above problems, the present application provides a fluorination tail gas treatment device based on three-stage tail gas absorption. The device greatly improves the removal rate of fluoride in the tail gas by setting three-stage spray towers and multiple pipelines, ensuring that the treated tail gas discharge fully meets the environmental protection standards.

[0005] To achieve the above purpose, the present application provides a fluorination tail gas treatment device, comprising: a first spray tower, a second spray tower, a first pipeline, a second pipeline and a third pipeline, the first spray tower is internally provided with a first accommodating cavity, a first spraying cavity and a first exhaust cavity, the first accommodating cavity, the first spraying cavity and the first exhaust cavity are sequentially arranged from bottom to top, and the first accommodating cavity, the first spraying cavity and the first exhaust cavity are mutually communicated; the second spray tower is internally provided with a second accommodating cavity, a second spraying cavity and a second exhaust cavity, the second accommodating cavity, the second spraying cavity and the second exhaust cavity are sequentially arranged from bottom to top, and the second accommodating cavity, the second spraying cavity and the second exhaust cavity are mutually communicated; one end of the first pipeline is communicated with the bottom of the first spraying cavity, and the other end is communicated with the equipment exhaust port; one end of the second pipeline is communicated with the first exhaust cavity, and the other end is communicated with the bottom of the second spraying cavity; one end of the third pipeline is communicated with the first accommodating cavity, and the other end is communicated with the second accommodating cavity, and the third pipeline is used for draining the liquid in the second accommodating cavity to the first accommodating cavity.

[0006] Distinguished from the prior art, the above technical scheme carries out preliminary treatment through the first spray tower, carries out secondary deep treatment through the second spray tower, and ensures that the fluoride content in the tail gas reaches the emission standard. This multi-stage processing mode can effectively avoid the processing bottleneck that may exist in single-stage processing. The third pipeline guides the spray liquid of the second spray tower to the first spray tower, thereby improving the utilization rate of resources and reducing the operating cost. At the same time, this design also ensures the stability and continuity of the entire system operation, avoiding shutdown due to depletion of spray liquid. Moreover, the series design of the first and second spray towers, combined with the efficient connection of the pipeline, makes the entire processing process smooth and orderly, greatly shortens the residence time of the tail gas in the device, improves the processing efficiency, not only can effectively remove the fluoride in the tail gas and reduce environmental pollution, but also can realize the recycling of resources, save costs, and maximize the operating efficiency and reliability of the entire system.

[0007] In some embodiments, the fluorinated tail gas treatment device further comprises a fourth pipeline, one end of the fourth pipeline being in communication with the first accommodating cavity, and the other end being in communication with a collection tower for collecting spray liquid.

[0008] In some embodiments, the fluorinated tail gas treatment device further comprises a third spray tower, a fifth pipeline and a sixth pipeline, the third spray tower being internally provided with a third accommodating cavity, a third spray cavity and a third exhaust cavity, the third accommodating cavity, the third spray cavity and the third exhaust cavity being arranged in sequence from bottom to top and being in communication with each other; one end of the fifth pipeline being in communication with the second exhaust cavity, and the other end being in communication with the bottom of the third spray cavity; one end of the sixth pipeline being in communication with the second accommodating cavity, and the other end being in communication with the third accommodating cavity, the sixth pipeline being used to guide the liquid in the third accommodating cavity to the second accommodating cavity.

[0009] In some embodiments, the fluorinated tail gas treatment device further comprises a seventh pipeline, one end of the seventh pipeline being in communication with the third accommodating cavity, and the other end being in communication with a liquid injection tower for introducing spray liquid into the third accommodating cavity.

[0010] In some embodiments, the first spray tower is provided with a first reflux pipeline, one end of the first reflux pipeline being connected to the first accommodating cavity, and the other end being connected to the top of the first spray cavity.

[0011] In some embodiments, the second spray tower is provided with a second reflux pipeline, one end of the second reflux pipeline being connected to the second accommodating cavity, and the other end being connected to the top of the second spray cavity.

[0012] In some embodiments, the third spray tower is provided with a third reflux pipeline, one end of the third reflux pipeline is connected with the third accommodating cavity, and the other end of the third reflux pipeline is connected with the top of the third spray cavity.

[0013] Unlike the prior art, the fluorinated tail gas treatment device has the following advantages

[0014] Beneficial effects:

[0015] The three-stage spray tower design greatly improves the removal efficiency of fluorides in the tail gas. The first spray tower performs preliminary treatment, the second spray tower performs secondary deep treatment, and the third spray tower performs deep purification of the tail gas again. The staged treatment of each spray tower can effectively remove higher concentrations of fluorides and other harmful substances, ensuring that the tail gas emission meets more stringent environmental protection standards.

[0016] The technical solution of the present application includes a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline and a seventh pipeline, which connect the first spray tower, the second spray tower, the third spray tower and the collection tower, optimize the overall structure, realize the recycling of the spray liquid in the three-stage spray tower, not only improve the utilization rate of resources and reduce the operating cost, but also ensure the stability and continuity of the whole system operation, avoid the shutdown caused by the depletion of the spray liquid. In addition, the series design of the first spray tower, the second spray tower and the third spray tower and the efficient connection of multiple pipelines make the whole treatment process more smooth and orderly, greatly shorten the residence time of the tail gas in the device, and further improve the treatment efficiency.

[0017] In addition, the first spray tower, the second spray tower and the third spray tower are respectively provided with a first reflux pipeline, a second reflux pipeline and a third reflux pipeline, which further optimize the liquid circulation mechanism inside each spray tower and improve the operating efficiency of the whole system. Stable spray liquid concentration ensures the continuity and reliability of the reaction process, improves the removal efficiency of fluorides, and makes an important contribution to the performance improvement of the whole fluorinated tail gas treatment system.

[0018] In summary, the fluorinated tail gas treatment device has significant advantages in improving treatment efficiency, enhancing resource utilization and reducing environmental impact, providing an efficient and economical environmental protection solution for related industries. At the same time, the treated spray liquid can also be sold, generating certain economic value and realizing the win-win of environmental protection and economic benefits.

[0019] The above description is only a summary of the technical solution of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0021] Figure 1 A structural diagram of a fluorinated tail gas treatment device according to a specific embodiment;

[0022] Figure 2 The diagram shows the structure of the first spray tower as a specific implementation method;

[0023] Figure 3 The diagram shows the structure of the first and second spray towers for a specific implementation.

[0024] Figure 4 The diagram shows the structure of the first accommodating cavity, the first spray cavity, the first exhaust cavity, and the first return pipeline in a specific implementation method.

[0025] Figure 5 The diagram shows the structure of the collection tower as described in the specific implementation.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10. First spray tower; 20. Second spray tower; 30. First pipeline; 40. Second pipeline; 50. Third pipeline; 60. Fourth pipeline; 70. Third spray tower; 80. Fifth pipeline; 90. Sixth pipeline; 100. Seventh pipeline;

[0028] 11. First receiving cavity; 12. First spray cavity; 13. First exhaust cavity; 14. First return pipeline;

[0029] 21. Second receiving chamber; 22. Second spray chamber; 23. Second exhaust chamber; 24. Second return pipe;

[0030] 71. Third receiving chamber; 72. Third spray chamber; 73. Third exhaust chamber; 74. Third return pipeline. Detailed Implementation

[0031] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, the use herein of the singular is also to be construed as a use of the plural and vice versa.

[0033] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0034] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, or to a particular embodiment, or to a particular set of embodiments, and is not necessarily used consistently throughout. It will be explicitly understood by one of ordinary skill in the art that the embodiments described herein can be combined with other embodiments.

[0035] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0036] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0037] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application, which do not indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0038] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0039] Please refer to Figures 1 to 5 The embodiment provides a fluorinated tail gas treatment device, which comprises a first spray tower 10, a second spray tower 20, a first pipeline 30, a second pipeline 40 and a third pipeline 50. The first spray tower 10 is internally provided with a first accommodating cavity 11, a first spray cavity 12 and a first exhaust cavity 13. The first accommodating cavity 11, the first spray cavity 12 and the first exhaust cavity 13 are sequentially arranged from bottom to top and are in communication with each other. The second spray tower 20 is internally provided with a second accommodating cavity 21, a second spray cavity 22 and a second exhaust cavity 23. The second accommodating cavity 21, the second spray cavity 22 and the second exhaust cavity 23 are sequentially arranged from bottom to top and are in communication with each other. One end of the first pipeline 30 is in communication with the bottom of the first spray cavity 12, and the other end is in communication with the exhaust port of the device. One end of the second pipeline 40 is in communication with the first exhaust cavity 13, and the other end is in communication with the bottom of the second spray cavity 22. One end of the third pipeline 50 is in communication with the first accommodating cavity 11, and the other end is in communication with the second accommodating cavity 21. The third pipeline 50 is used for draining the liquid in the second accommodating cavity 21 into the first accommodating cavity 11.

[0040] In the embodiment, one end of the first pipeline 30 is connected with the bottom of the first spray cavity 12, and the other end is connected with the exhaust port of the device, which is used for introducing the tail gas containing fluorides discharged by the device into the first spray cavity 12 of the first spray tower 10. One end of the second pipeline 40 is connected with the first exhaust cavity 13, and the other end is connected with the bottom of the second spray cavity 22, which is used for introducing the tail gas preliminarily treated in the first spray tower 10 into the second spray cavity 22 of the second spray tower 20 for secondary treatment. The third pipeline 50 is connected with the first accommodating cavity 11 and the second accommodating cavity 21, which is used for draining the spray liquid in the second accommodating cavity 21 into the first accommodating cavity 11.

[0041] The whole process is as follows: first, the tail gas containing fluoride enters the first spray cavity 12 through the first pipeline 30, in the process, the tail gas will be in full contact with the spray liquid in the first containing cavity 11, chemical reaction occurs, so that part of the fluoride is absorbed and neutralized. The treated tail gas enters the second spray tower 20 through the first exhaust cavity 13 into the second spray cavity 22 of the second spray tower 20 for secondary treatment. In the second spray cavity 22, the tail gas will be in full contact with the spray liquid in the second containing cavity 21 again, further removing residual fluoride. Finally, the treated tail gas is discharged through the second exhaust cavity 23. At the same time, the third pipeline 50 leads the spray liquid in the second containing cavity 21 to the first containing cavity 11, ensuring the recycling of the spray liquid and improving the resource utilization efficiency of the whole system.

[0042] The first spray tower 10 is used for preliminary treatment, and the second spray tower 20 is used for secondary deep treatment to ensure that the fluoride content in the tail gas meets the emission standard. This multi-stage processing method can effectively avoid the processing bottleneck that may exist in single-stage processing. The third pipeline 50 leads the spray liquid of the second spray tower 20 to the first spray tower 10, which not only improves the resource utilization rate, but also reduces the operating cost. At the same time, this design also ensures the stability and continuity of the whole system operation, avoids downtime due to depletion of spray liquid. Moreover, the series design of the first and second spray towers, combined with the efficient connection of the pipeline, makes the whole processing process smooth and orderly, greatly shortens the residence time of the tail gas in the device, improves the processing efficiency, not only can effectively remove the fluoride in the tail gas and reduce environmental pollution, but also can realize the recycling of resources, save costs, and maximize the operating efficiency and reliability of the whole system.

[0043] Please refer to Figures 1 to 5 In some embodiments, the fluoride-containing tail gas treatment device further comprises a fourth pipeline 60, one end of the fourth pipeline 60 is in communication with the first containing cavity 11, and the other end is in communication with a collection tower for collecting spray liquid.

[0044] In this embodiment, the fluorinated tail gas treatment device further increases the fourth pipeline 60, aiming to optimize the collection and recycling of the spray liquid. Specifically, one end of the fourth pipeline 60 is connected to the first accommodating cavity 11, and the other end is connected to the collection tower. The main function of the collection tower is to collect the spray liquid generated after the chemical reaction from the first spray cavity 12 and the second spray cavity 22. By setting the collection tower, the treated liquid can be effectively collected, avoiding the waste of spray liquid. During the treatment process, the spray liquid in the first spray cavity 12 will adsorb part of the fluorinated compounds after contacting with the fluorinated tail gas, forming fluorine-containing waste liquid. Through the fourth pipeline 60, the collection tower can timely collect these waste liquid, facilitating subsequent treatment or recycling. In addition, the liquid in the collection tower can be regularly extracted for further treatment or recycled back to the first accommodating cavity 11 to ensure the stable supply and effectiveness of the spray liquid. This design not only improves the efficiency of fluorinated tail gas treatment, but also enhances the environmental performance of the device.

[0045] Please refer to Figures 1 to 5 In some embodiments, the fluorinated tail gas treatment device further comprises a third spray tower 70, a fifth pipeline 80 and a sixth pipeline 90. The third spray tower 70 has a third accommodating cavity 71, a third spray cavity 72 and a third exhaust cavity 73 arranged in order from bottom to top, and the third accommodating cavity 71, the third spray cavity 72 and the third exhaust cavity 73 are in communication with each other. One end of the fifth pipeline 80 is in communication with the second exhaust cavity 23, and the other end is in communication with the bottom of the third spray cavity 72. One end of the sixth pipeline 90 is in communication with the second accommodating cavity 21, and the other end is in communication with the third accommodating cavity 71. The sixth pipeline 90 is used to introduce the liquid in the third accommodating cavity 71 into the second accommodating cavity 21.

[0046] In this embodiment, the third spray tower 70 has a third accommodating cavity 71, a third spray cavity 72 and a third exhaust cavity 73 arranged in order from bottom to top, and the three cavities are in communication with each other to form a complete treatment unit. The third spray tower 70 can further clean the tail gas after preliminary and secondary treatment. Specifically, the tail gas treated by the first and second spray towers 20 flows into the third spray cavity 72 through the fifth pipeline 80, further contacts with the spray liquid, and removes the fluorinated compounds and other harmful components that may be left in the tail gas. The cleaned tail gas is finally discharged through the third exhaust cavity 73, realizing safe and environmentally friendly discharge of the gas.

[0047] The sixth pipeline 90 connects the second accommodating cavity 21 and the third accommodating cavity 71, and is responsible for draining the waste liquid generated in the third accommodating cavity 71 back to the second accommodating cavity 21. This not only realizes the recycling of the spraying liquid, but also enhances the overall stability and efficiency of the treatment system. In this way, the spraying liquid in the third spraying cavity 72 is in full contact with the tail gas, and can effectively adsorb and neutralize the residual fluorides during the reaction process. After the triple treatment, the harmful components in the tail gas can be almost completely removed, thereby meeting the environmental protection emission standard.

[0048] In addition, the concentration and flow of the spraying liquid can be adjusted individually according to the needs of each spraying tower, so as to optimize the treatment effect. The introduction of the third spraying tower 70 can make the whole treatment process more flexible, which not only improves the treatment efficiency, but also facilitates the maintenance and upgrading in the later stage.

[0049] Please refer to Figures 1 to 5 In some embodiments, the fluorinated tail gas treatment device further comprises a seventh pipeline 100, one end of which is in communication with the third accommodating cavity 71, and the other end of which is in communication with a liquid injection tower for introducing spraying liquid into the third accommodating cavity 71. In this embodiment, the spraying liquid is mainly composed of water or other solutions that can react with fluorinated tail gas, to ensure the continuous provision of sufficient reaction medium during the treatment process. This design allows the flow and concentration of the spraying liquid to be dynamically adjusted as needed during operation, thereby ensuring the continuity and effectiveness of the reaction.

[0050] In some embodiments, the tail gas treatment device further comprises a concentration detection device and a pump for real-time monitoring of the concentration of the liquid in the first accommodating cavity 11. The concentration detection device is placed in the first accommodating cavity 11, and when the concentration of the liquid in the first accommodating cavity 11 reaches 20%, the valve on the fourth pipeline 60 is first opened to empty the liquid in the first accommodating cavity 11. This process helps to remove the saturated liquid and prevent the concentration from being too high to affect the subsequent treatment effect. Then, the valve on the third pipeline 50 is opened to empty the liquid in the second accommodating cavity 21 and make the liquid enter the first accommodating cavity 11, thereby realizing the reuse of the liquid and efficient management of resources. Then, the valve on the sixth pipeline 90 is opened to empty the liquid in the third accommodating cavity 71 and make the liquid enter the second accommodating cavity 21, to ensure that the liquid circulation of the whole system is not blocked. Finally, the seventh pipeline 100 is used to supplement new spraying liquid to the third accommodating cavity 71, and the spraying liquid can be water or other liquids that can react with fluorinated tail gas.

[0051] The seventh pipeline 100 and the liquid injection tower are integrated in this embodiment, so that the fluorinated tail gas treatment device can realize real-time replenishment and concentration adjustment of the spraying liquid, improve the use efficiency of the spraying liquid, and ensure the stability of the reaction conditions. Moreover, the treatment efficiency can be effectively avoided due to the decrease of the concentration of the spraying liquid, thereby ensuring the continuity and effectiveness of the treatment process. The concentration detection device improves the automation and intelligent level of the system. When the liquid concentration reaches the set threshold value, the automatic emptying mechanism can ensure the timely replacement of the liquid, avoiding equipment failure or treatment effect caused by too high liquid concentration. Not only improves the operation safety of the equipment, but also reduces the operation cost.

[0052] Referring to Figures 1 to 5 In some embodiments, the first spraying tower 10 is provided with a first reflux pipeline 14, one end of which is connected to the first accommodating cavity 11, and the other end is connected to the top of the first spraying cavity 12.

[0053] In this embodiment, one end of the first reflux pipeline 14 is connected to the first accommodating cavity 11, and the other end is connected to the top of the first spraying cavity 12, so as to realize the recycling of the spraying liquid in the first spraying cavity 12. Specifically, in the first spraying cavity 12, the fluorine-containing tail gas is fully contacted with the spraying liquid, and chemical reaction and absorption occur. This process will cause the concentration of the spraying liquid to gradually increase. In order to maintain the stability of the spraying liquid and the reaction effect, the first reflux pipeline 14 extracts part of the reacted spraying liquid from the first accommodating cavity 11 and re-delivers it to the top of the first spraying cavity 12. Thus, the spraying liquid can be recycled in the first spraying cavity 12, and continuously contacted with the tail gas, thereby improving the mass transfer efficiency of the whole reaction process. At the same time, this design also avoids the problem of frequent replacement of the spraying liquid due to too high concentration, thereby reducing the operation cost.

[0054] Referring to Figures 1 to 5 In some embodiments, the second spraying tower 20 is provided with a second reflux pipeline 24, one end of which is connected to the second accommodating cavity 21, and the other end is connected to the top of the second spraying cavity 22.

[0055] In the embodiment, in addition to the first reflux pipeline 14 arranged on the first spray tower 10, the fluoridation tail gas treatment device further increases a second reflux pipeline 24 on the second spray tower 20. One end of the second reflux pipeline 24 is connected to the second containing cavity 21, and the other end is connected to the top of the second spray cavity 22, further optimizing the spray liquid circulation mechanism inside the second spray tower 20 and improving the processing efficiency of the whole device. Similar to the first reflux pipeline 14, in the second spray cavity 22, the tail gas after preliminary treatment by the first spray tower 10 is subjected to secondary reaction and absorption with the spray liquid in the second spray cavity 22, so that the concentration of the spray liquid in the second spray cavity 22 gradually increases. The second reflux pipeline 24 extracts part of the reacted spray liquid from the second containing cavity 21 and retransmits it to the top of the second spray cavity 22, so that the spray liquid can be continuously circulated in the second spray cavity 22 and continuously contacted with the tail gas, improving the mass transfer efficiency of the whole reaction process.

[0056] Please refer to Figures 1 to 5 In some embodiments, the third spray tower 70 is provided with a third reflux pipeline 74, one end of the third reflux pipeline 74 being connected to the third containing cavity 71 and the other end being connected to the top of the third spray cavity 72.

[0057] In the embodiment, one end of the third reflux pipeline 74 is connected to the third containing cavity 71, and the other end is connected to the top of the third spray cavity 72, further optimizing the spray liquid circulation mechanism inside the third spray tower 70 and improving the processing efficiency of the whole device. Similar to the first reflux pipeline 14 and the second reflux pipeline 24, through the arrangement of the third reflux pipeline 74, the spray liquid in the third spray cavity 72 can be continuously circulated, reducing the demand for fresh liquid and further optimizing the liquid circulation mechanism inside the third spray tower 70, improving the operation efficiency of the whole fluoridation tail gas treatment system, reducing the operation cost and reducing the load on the environment.

[0058] By adopting the above technical scheme, the utility model has the beneficial effects compared with the prior art:

[0059] The utility model adopts the design of three-stage spray tower, greatly improves the removal efficiency of fluorides in tail gas. The first spray tower 10 performs preliminary treatment, the second spray tower 20 performs secondary deep treatment, and the third spray tower 70 performs deep purification on the tail gas again, so that the staged treatment of each spray tower can effectively remove higher concentration fluorides and other harmful substances, and ensure that the tail gas emission meets more stringent environmental protection standards.

[0060] The technical scheme of the application comprises a first pipeline 30, a second pipeline 40, a third pipeline 50, a fourth pipeline 60, a fifth pipeline 80, a sixth pipeline 90 and a seventh pipeline 100, which connect the first spray tower 10, the second spray tower 20, the third spray tower 70 and the collection tower, optimize the overall structure, realize the recycling of the spray liquid in the three-stage spray tower, not only improve the utilization rate of resources and reduce the operation cost, but also ensure the stability and continuity of the whole system operation, avoid the shutdown caused by the depletion of the spray liquid. In addition, the series design of the first spray tower 10, the second spray tower 20 and the third spray tower 70 and the efficient connection of the multiple pipelines make the whole treatment process more smooth and orderly, greatly shorten the residence time of the tail gas in the device and further improve the treatment efficiency.

[0061] In addition, the utility model discloses a first backflow pipeline 14, a second backflow pipeline 24 and a third backflow pipeline 74 are arranged on the first spray tower 10, the second spray tower 20 and the third spray tower 70 respectively, which further optimizes the liquid circulation mechanism in each spray tower and improves the operation efficiency of the whole system. Stable spray liquid concentration ensures the continuity and reliability of the reaction process and improves the removal efficiency of fluorides, which makes an important contribution to the performance improvement of the whole fluorinated tail gas treatment system.

[0062] In summary, the fluorinated tail gas treatment device provided by the utility model has remarkable advantages in improving treatment efficiency, enhancing resource utilization and reducing environmental impact, and provides an efficient and economical environmental protection solution for the related industry. At the same time, the treated spray liquid can also be sold, which can generate certain economic value and realize the win-win of environmental protection and economic benefits.

[0063] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application, and they should be covered in the scope of the claims and the specification of the application. Especially, as long as there is no structural conflict, each technical feature mentioned in the embodiments can be combined in any way. The application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A fluorinated tail gas treatment apparatus, characterized by, The application relates to a spray tower system. The first spray tower is internally provided with a first accommodating cavity, a first spray cavity and a first exhaust cavity, the first accommodating cavity, the first spray cavity and the first exhaust cavity are sequentially arranged from bottom to top, and the first accommodating cavity, the first spray cavity and the first exhaust cavity are communicated with each other. The second spray tower is internally provided with a second accommodating cavity, a second spray cavity and a second exhaust cavity, the second accommodating cavity, the second spray cavity and the second exhaust cavity are sequentially arranged from bottom to top, and the second accommodating cavity, the second spray cavity and the second exhaust cavity are communicated with each other. The first pipeline is communicated with the bottom of the first spray cavity at one end and communicated with the exhaust port of the equipment at the other end. The second pipeline is communicated with the first exhaust cavity at one end and communicated with the bottom of the second spray cavity at the other end. The third pipeline is communicated with the first accommodating cavity at one end and communicated with the second accommodating cavity at the other end, and the third pipeline is used for draining liquid in the second accommodating cavity into the first accommodating cavity.

2. The fluorinated tail gas treatment apparatus according to claim 1, characterized in that The fourth pipeline is communicated with the first accommodating cavity at one end and communicated with a collecting tower at the other end, and the collecting tower is used for collecting spray liquid. The third spray tower is internally provided with a third accommodating cavity, a third spray cavity and a third exhaust cavity, the third accommodating cavity, the third spray cavity and the third exhaust cavity are sequentially arranged from bottom to top, and the third accommodating cavity, the third spray cavity and the third exhaust cavity are communicated with each other.

3. The fluorinated tail gas treatment apparatus according to claim 1, wherein The fifth pipeline is communicated with the second exhaust cavity at one end and communicated with the bottom of the third spray cavity at the other end. The sixth pipeline is communicated with the second accommodating cavity at one end and communicated with the third accommodating cavity at the other end, and the sixth pipeline is used for draining liquid in the third accommodating cavity into the second accommodating cavity. The seventh pipeline is communicated with the third accommodating cavity at one end and communicated with a liquid injection tower at the other end, and the liquid injection tower is used for introducing spray liquid into the third accommodating cavity. The first spray tower is provided with a first reflux pipeline, one end of the first reflux pipeline is connected with the first accommodating cavity, and the other end of the first reflux pipeline is connected with the top of the first spray cavity.

4. The fluorinated tail gas treatment apparatus according to claim 3, wherein The second spray tower is provided with a second reflux pipeline, one end of the second reflux pipeline is connected with the second accommodating cavity, and the other end of the second reflux pipeline is connected with the top of the second spray cavity. The third spray tower is provided with a third reflux pipeline, one end of the third reflux pipeline is connected with the third accommodating cavity, and the other end of the third reflux pipeline is connected with the top of the third spray cavity.

5. The fluorinated tail gas treatment apparatus according to claim 1, wherein The first spray tower and the second spray tower are arranged side by side.

6. The fluorinated tail gas treatment apparatus according to claim 1, wherein ​ 7. The fluorinated tail gas treatment apparatus according to claim 3, wherein ​ 8. The fluorinated tail gas treatment apparatus according to claim 1, wherein ​

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