Activated carbon adsorption regeneration tower and chemical waste gas treatment system
By designing an activated carbon adsorption regeneration tower with small-diameter heating pipes and gas distribution pipes, the problem of high cost caused by excessive volume was solved, the uniform distribution of steam and the activated carbon regeneration effect were improved, the risk of the equipment being identified as a pressure vessel was reduced, and the safety and maintenance convenience of the equipment were improved.
Patent Information
- Application Number
- CN202423051554.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Existing activated carbon adsorption regeneration towers are classified as pressure vessels due to their volume exceeding 25L, resulting in high production and operating costs. Furthermore, steam is difficult to uniformly enter the heating tubes, affecting the activated carbon regeneration effect.
A tube assembly with a heating tube inner diameter of less than 50mm and a gas distribution pipe volume of less than 25L was designed. The sealing and strength were ensured by welding to avoid being identified as a pressure vessel. The design of multi-layer gas distribution pipes and water collection pipes was used to achieve uniform steam distribution and effective use of cooling water.
It reduces the production and operating costs of activated carbon adsorption regeneration towers, improves the uniform distribution of steam and the regeneration effect of activated carbon, and enhances the safety and ease of maintenance of the equipment.
Smart Images
Figure CN223490716U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of chemical gas treatment technology, and more specifically, to an activated carbon adsorption regeneration tower and a chemical waste gas treatment system. Background Technology
[0002] In existing activated carbon adsorption regeneration towers, there is a chamber with a volume greater than 25L above the tubes, which makes the existing activated carbon adsorption regeneration towers classified as pressure vessels. This means that the production and manufacturing of activated carbon adsorption regeneration towers must be carried out according to strict standards, resulting in high costs for existing activated carbon adsorption regeneration towers. Utility Model Content
[0003] The purpose of this application is to provide an activated carbon adsorption regeneration tower and a chemical waste gas treatment system to reduce costs.
[0004] The embodiments of this application are implemented as follows:
[0005] In a first aspect, embodiments of this application provide an activated carbon adsorption regeneration tower, comprising a tank body, wherein a tube assembly is disposed within the tank body, the tube assembly comprising multiple vertically arranged heating tubes, the inner diameter of the heating tubes being less than 50 mm, and activated carbon being disposed between the heating tubes; a first tube group is welded to the top of the tube assembly, the first tube group comprising multiple first gas distribution tubes and multiple second gas distribution tubes, each of the first gas distribution tubes and each of the second gas distribution tubes being horizontally arranged, and each having a volume of less than 25 L.
[0006] Vertically, the second gas distribution pipe is located between the first gas distribution pipe and the heating pipe, and each of the first gas distribution pipes is connected to multiple second gas distribution pipes; the first gas distribution pipe has a first inlet for introducing steam, and the second gas distribution pipe has multiple first outlets spaced axially upward, with each first outlet corresponding to and welded to the first end of the heating pipe.
[0007] In the above technical solution, since the volumes of both the first and second gas distribution pipes are less than 25L and the inner diameter of the heating pipe is less than 50mm, the activated carbon adsorption regeneration tower will not be considered a pressure vessel when steam is fed into the tube assembly using the first pipe group. Therefore, the activated carbon adsorption regeneration tower provided by the above technical solution has lower requirements and can reduce costs.
[0008] In the above technical solution, a heat exchange medium can be introduced into the heating tube. For example, during adsorption, cooling water is introduced into the heating tube to lower the temperature; during desorption, steam is introduced into the heating tube to heat it. Since the first outlet in the tube assembly is welded to the heating tube, the connection method has good sealing performance and high strength, which can meet the safety requirements of the activated carbon adsorption regeneration tower during use.
[0009] In some alternative embodiments, the first tube assembly further includes multiple third gas distribution tubes, each third gas distribution tube having a volume of less than 25L; the third gas distribution tubes are horizontally arranged and vertically located between the first gas distribution tubes and the third gas distribution tubes; each first gas distribution tube connects to multiple third gas distribution tubes, and each third gas distribution tube connects to multiple second gas distribution tubes; the number of second gas distribution tubes is greater than the number of third gas distribution tubes, and the number of third gas distribution tubes is greater than the number of first gas distribution tubes.
[0010] In the above technical solution, the first, third, and second gas distribution pipes are connected sequentially. Steam enters the first gas distribution pipe from the first inlet and then enters the heating pipe from the first outlet of the second gas distribution pipe, thereby distributing the steam in the first gas distribution pipe to a large number of heating pipes. Furthermore, since the number of the first, third, and second gas distribution pipes increases sequentially, only a small number of first gas distribution pipes are needed. Consequently, the first pipe group only needs to be connected to a small number of inlet pipes for supplying steam, simplifying the structure of the activated carbon adsorption regeneration tower.
[0011] In some alternative embodiments, the outer diameter of the second gas distribution pipe is not less than the outer diameter of the heating pipe, the outer diameter of the third gas distribution pipe is not less than the outer diameter of the second gas distribution pipe, and the outer diameter of the first gas distribution pipe is not less than the outer diameter of the third gas distribution pipe.
[0012] In the above technical solution, the outer diameter of the second gas distribution pipe is not less than the outer diameter of the heating pipe. Therefore, it is relatively convenient to set the first outlet in the second gas distribution pipe and weld the heating pipe to the first outlet of the second gas distribution pipe. In the above technical solution, the inner diameter of the first, second, and third gas distribution pipes can all be made relatively large while ensuring that the volume does not exceed 25L. The outer diameter is also relatively large, which facilitates the connection of the first and third gas distribution pipes with the second gas distribution pipe.
[0013] In some alternative implementations, the upper side of the third air distribution pipe is connected to multiple first vertical pipes, and the first vertical pipes are connected to the first air distribution pipes in a one-to-one correspondence, so that each first air distribution pipe is connected to the same third air distribution pipe.
[0014] The lower side of the third air distribution pipe is connected to multiple second vertical pipes, and the second vertical pipes are connected to the second air distribution pipes in a one-to-one correspondence, so that each second air distribution pipe is connected to the same third air distribution pipe.
[0015] The inner diameter of the first vertical pipe is larger than the inner diameter of the second vertical pipe.
[0016] In the above technical solution, since the number of the first, third, and second gas distribution pipes increases sequentially, and the first vertical pipe connects the first and third gas distribution pipes, while the second vertical pipe connects the third and second gas distribution pipes, it can be concluded that the number of first vertical pipes installed in the third gas distribution pipe is less than the number of second vertical pipes. Therefore, based on this, the inner diameter of the first vertical pipe is larger than that of the second vertical pipe, which ensures that the amount of steam flowing into the third gas distribution pipe through the first vertical pipe matches the amount of steam flowing out of the third gas distribution pipe through the second vertical pipe, so that the steam in the third gas distribution pipe can flow evenly into the second gas distribution pipe.
[0017] In some alternative implementations, a second pipe group is further connected below the tube assembly; the second pipe group includes a plurality of first water collection pipes and a plurality of second water collection pipes, and vertically, the second water collection pipes are located between the first water collection pipes and the heating pipes; the first water collection pipes are connected to a plurality of second water collection pipes arranged side by side; the first water collection pipes are provided with a second inlet for introducing cooling water, and the circumferential surface of the second water collection pipes is provided with a plurality of second outlets, and the second outlets are correspondingly provided and welded to the second ends of the heating pipes.
[0018] In the above technical solution, cooling water can be introduced into the heating tube through the second tube assembly to cool the activated carbon during the adsorption process.
[0019] In some alternative implementations, the tank is provided with an air inlet pipe and a water inlet pipe, the air inlet pipe being detachably connected to the first inlet and the water inlet pipe being detachably connected to the second inlet.
[0020] In the above technical solution, the air inlet pipe serves to deliver steam into the first pipe assembly and supply cooling water for outflow, while the water inlet pipe serves to deliver cooling water into the second pipe assembly and supply steam for outflow. Since the air inlet pipe is detachably connected to the first inlet and the water inlet pipe is detachably connected to the second inlet, it is convenient to disassemble the air inlet pipe from the first pipe assembly and the water inlet pipe from the second pipe assembly, thus facilitating the assembly and disassembly of the tube assembly, the first pipe assembly, and the second pipe assembly within the tank.
[0021] In some alternative implementations, a support plate is provided circumferentially on the inner wall of the tank, and the tube assembly is hung on the support plate.
[0022] In the above technical solution, the tube assembly is hung inside the tank by a support rod, and the outside of the tube assembly is subjected to force. Compared with the method of directly supporting the tube assembly on the carbon bottom plate, the positioning and installation of the tube assembly is more convenient.
[0023] In some alternative embodiments, the spacing between two adjacent heating tubes is less than or equal to 50 mm; the support plate is connected to a collar, the tube assembly is located inside the collar, and the minimum distance between the outer heating tube and the inner side of the collar is less than or equal to 50 mm.
[0024] In the above technical solution, activated carbon is located inside the collar and fills the space between the collar and the heating tube and between two adjacent heating tubes. Due to the poor thermal conductivity of activated carbon, when the distance between two adjacent heating tubes and the minimum distance between the tubes and the inner side of the collar are less than or equal to 50 mm, the activated carbon in all positions can exchange heat well with the medium in the heating tube.
[0025] In some alternative embodiments, the tank is provided with an air inlet on the lower side and an air outlet on the upper side, and a carbon base plate for supporting activated carbon is provided inside the tank, with the tube assembly located above the carbon base plate.
[0026] In the above technical solution, the exhaust gas can enter the tank through the inlet, and then pass through the activated carbon supported on the carbon bottom plate to achieve the adsorption process. The gas after being adsorbed by the activated carbon is then discharged from the outlet.
[0027] Secondly, embodiments of this application provide a chemical waste gas treatment system, including the activated carbon regeneration tower provided in the first aspect. Attached Figure Description
[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a three-dimensional structural diagram of the activated carbon adsorption regeneration tower provided in an embodiment of this application;
[0030] Figure 2 This is one of the exploded views of the activated carbon adsorption regeneration tower provided in the embodiments of this application;
[0031] Figure 3 This is the second exploded view of the activated carbon adsorption regeneration tower provided in the embodiments of this application;
[0032] Figure 4This is a schematic diagram of the first tube group, the tube assembly, and the second tube group located inside the collar in an embodiment of this application.
[0033] Icons: 100-Tank body; 110-Tank wall; 120-Upper tower cover; 121-Gas outlet; 122-Nitrogen port; 130-Lower tower cover; 131-Gas inlet; 210-Heating tube; 300-First pipe group; 310-First gas distribution pipe; 320-Second gas distribution pipe; 330-Third gas distribution pipe; 341-First vertical pipe; 342-Second vertical pipe; 350-Connecting pipe; 400-Second pipe group; 410-First water collection pipe; 420-Second water collection pipe; 510-Water inlet pipe; 520-Gas inlet pipe; 610-Support plate; 620-Collar ring; 700-Carbon bottom plate. Detailed Implementation
[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0035] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0037] In the description of this application, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0038] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0039] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0040] Activated carbon adsorption regeneration towers are widely used in the petrochemical, biotechnology and pharmaceutical, chemical, surface coating, and environmental treatment industries to recover and treat volatile organic compounds (VOCs) contained in waste gases. The tower contains a tube array consisting of hundreds of longitudinally arranged heating tubes, with activated carbon placed within the gaps between them. The tower performs both adsorption and desorption processes. Adsorption involves treating the waste gas with activated carbon, during which cooling water is introduced into the heating tubes. Desorption, the regeneration of the activated carbon, requires the introduction of steam into the heating tubes.
[0041] According to the "Safety Technical Supervision Regulations for Pressure Vessels," containers with a maximum working pressure ≥0.1MPa and a volume ≥25L are considered pressure vessels. The manufacture of pressure vessels requires strict adherence to standards and annual inspections, resulting in higher costs for activated carbon adsorption regeneration towers classified as pressure vessels. Existing activated carbon adsorption regeneration towers have a chamber with a volume ≥25L above the tube assembly, and the upper ends of the heating tubes are connected to this chamber. During desorption, steam enters this chamber and then, due to pressure, flows into the heating tubes. Therefore, to prevent the activated carbon adsorption regeneration tower from being classified as a pressure vessel, those skilled in the art using existing technology ensure that the steam pressure does not exceed 0.1MPa. This low pressure makes it difficult to achieve uniform steam flow into each heating tube, resulting in poor activated carbon regeneration.
[0042] Based on this, this application provides a chemical waste gas treatment system, which includes an activated carbon adsorption regeneration tower, and the activated carbon adsorption regeneration tower provided by this application does not meet the conditions for being identified as a pressure vessel due to its volume being greater than 25L.
[0043] like Figures 1 to 4As shown, the activated carbon adsorption regeneration tower includes a tank 100, and a tube assembly is provided inside the tank 100. The tube assembly includes multiple vertically arranged heating tubes 210. The inner diameter of the heating tubes 210 is less than 50 mm, and activated carbon is placed between the heating tubes 210. Since the inner diameter of the heating tubes 210 is less than 50 mm, the heating tubes 210 are not included in the pressure vessel and pressure pipeline.
[0044] A first tube group 300 is welded to the top of the tube assembly. The first tube group 300 includes multiple first gas distribution pipes 310 and multiple second gas distribution pipes 320. Each first gas distribution pipe 310 and each second gas distribution pipe 320 is horizontally arranged and has a volume of less than 25L. Vertically, the second gas distribution pipes 320 are located between the first gas distribution pipes 310 and the heating pipes 210, and each first gas distribution pipe 310 is connected to multiple second gas distribution pipes 320. The first gas distribution pipes 310 have a first inlet for introducing steam, and the second gas distribution pipes 320 are axially spaced with multiple first outlets. The first outlets are correspondingly arranged and welded to the first ends of the heating pipes 210.
[0045] In the activated carbon adsorption regeneration tower provided by the above embodiments, since the volumes of the first gas distribution pipe 310 and the second gas distribution pipe 320 are both less than 25L, the activated carbon adsorption regeneration tower will not be considered a pressure vessel, thereby reducing the production, use and subsequent operation and maintenance costs of the activated carbon adsorption regeneration tower.
[0046] Furthermore, since the activated carbon adsorption regeneration tower provided in the above embodiment does not meet the condition of being identified as a pressure vessel due to its volume being greater than 25L, the pressure of the steam introduced into the first pipe group 300 through the first inlet during the desorption process can be greater than 0.1MPa, thereby allowing the steam to enter each heating pipe 210 more evenly through the first outlet, so as to improve the regeneration effect of activated carbon.
[0047] Since the first end of the heating tube 210 is welded to the position where the first outlet is provided in the second gas distribution pipe 320, the connection between the heating tube 210 and the second gas distribution pipe 320 has good sealing performance and high strength, which can meet the application scenario where the pressure of the introduced steam is greater than 0.1MPa.
[0048] In some embodiments of this application, the first pipe assembly 300 further includes multiple third gas distribution pipes 330, each with a volume less than 25L. The third gas distribution pipes 330 are horizontally arranged and vertically positioned between the first gas distribution pipe 310 and the third gas distribution pipe 330. Each first gas distribution pipe 310 connects to multiple third gas distribution pipes 330, and each third gas distribution pipe 330 connects to multiple second gas distribution pipes 320. The number of second gas distribution pipes 320 is greater than the number of third gas distribution pipes 330, and the number of third gas distribution pipes 330 is greater than the number of first gas distribution pipes 310. The number of second gas distribution pipes 320 can be determined based on the number of heating pipes 210, and the number of first gas distribution pipes 310 can be determined based on the number of external gas supply pipes. For example, if there are four external gas supply pipes, the pipe assembly has four first inlets. Correspondingly, in embodiments where each first gas distribution pipe 310 has only one first inlet, the number of first gas distribution pipes 310 is four.
[0049] In the above embodiment, the third steam distribution pipe 330 serves to collect the steam delivered by the first steam distribution pipe 310 and distribute the collected steam to the second steam distribution pipe 320. Since the number of the first steam distribution pipe 310, the third steam distribution pipe 330, and the second steam distribution pipe 320 increases sequentially, even if the number of the first steam distribution pipe 310 and the second steam distribution pipe 320 remains unchanged, adding the third steam distribution pipe 330 allows the steam to fill the second steam distribution pipe 320 more evenly, and then distribute the steam evenly to each heating pipe 210.
[0050] Furthermore, such as Figure 4 As shown, the first air distribution pipe 310 and the third air distribution pipe 330 are perpendicular to each other, and the third air distribution pipe 330 and the second air distribution pipe 320 are perpendicular to each other.
[0051] In some other embodiments, the third gas distribution pipe 330 may not be provided. Alternatively, more layers of gas distribution pipes with a volume of less than 25L may be provided between the first gas distribution pipe 310 and the second gas distribution pipe 320; for example, in some embodiments, a third gas distribution pipe 330 and a fourth gas distribution pipe may also be provided between the first gas distribution pipe 310 and the second gas distribution pipe 320 in the vertical direction.
[0052] Furthermore, the outer diameter of the second gas distribution pipe 320 is not less than the outer diameter of the heating pipe 210, the outer diameter of the third gas distribution pipe 330 is not less than the outer diameter of the second gas distribution pipe 320, and the outer diameter of the first gas distribution pipe 310 is not less than the outer diameter of the third gas distribution pipe 330. Since the second gas distribution pipe 320 has multiple first outlets spaced apart axially, and multiple heating pipes 210 are welded one-to-one at the positions of the first outlets, it is easier to weld the heating pipes 210 to the second gas distribution pipe 320 when the outer diameter of the second gas distribution pipe 320 is not less than the outer diameter of the heating pipes 210. It is also easy to understand that the larger the outer diameter of the second gas distribution pipe 320, the smaller the deformation of the second gas distribution pipe 320 after welding. Each first gas branch pipe 310 connects to multiple third gas branch pipes 330, and each third gas branch pipe 330 connects to multiple second gas branch pipes 320. When the outer diameter of the first gas branch pipe 310 is not less than the outer diameter of the third gas branch pipe 330, and the outer diameter of the third gas branch pipe 330 is not less than the outer diameter of the second gas branch pipe 320, it is easy to connect the first gas branch pipe 310 and the third gas branch pipe 330, and easy to connect the third gas branch pipe 330 and the second gas branch pipe 320 by welding.
[0053] The method of connecting the first gas distribution pipe 310 and the third gas distribution pipe 330 by welding is not limited to the direct welding of the first gas distribution pipe 310 and the third gas distribution pipe 330, but also includes the method of welding the first gas distribution pipe 310 and the third gas distribution pipe 330 to the two ends of a pipe respectively.
[0054] like Figure 4 In the illustrated embodiment, the upper side of the third gas distribution pipe 330 is connected to multiple first vertical pipes 341. Each first vertical pipe 341 is connected to a first inlet in each of the first gas distribution pipes 310, so that each third gas distribution pipe 330 is connected to multiple first gas distribution pipes 310. Furthermore, the first vertical pipes 341 are welded to both the third gas distribution pipe 330 and the first gas distribution pipe 310. It is easy to understand that both the third gas distribution pipe 330 and the first gas distribution pipe 310 have openings on their circumferences. The two ends of the first vertical pipes 341 are aligned with the openings on the circumferences of the first gas distribution pipe 310 and the third gas distribution pipe 330, respectively, to achieve communication between the first gas distribution pipes 310 and the third gas distribution pipe 330. The lower side of the third gas distribution pipe 330 is connected to multiple second vertical pipes 342. Each second vertical pipe 342 is connected to a second gas distribution pipe 320, so that each third gas distribution pipe 330 is connected to multiple second gas distribution pipes 320. The second vertical pipe 342 is also connected to the third gas branch pipe 330 and the second gas branch pipe 320 by welding.
[0055] Furthermore, the inner diameter of the first vertical tube 341 is larger than the inner diameter of the second vertical tube 342. Combined with... Figure 4It is easy to see that the number of first gas branch pipes 310 connected to the third gas branch pipe 330 is less than the number of second gas branch pipes 320 connected to it. Therefore, the number of first vertical pipes 341 provided in each third gas branch pipe 330 is less than the number of second vertical pipes 342. In this case, by making the inner diameter of the first vertical pipe 341 larger than the inner diameter of the second vertical pipe 342, the amount of steam flowing into the third gas branch pipe 330 through the first vertical pipe 341 can be matched with the amount of steam flowing out of the third gas branch pipe 330 through the second vertical pipe 342, so that the steam in the third gas branch pipe 330 can flow into the second gas branch pipe 320 evenly.
[0056] In some implementations, such as Figure 3 and Figure 4 As shown, a second tube group 400 is connected below the tube assembly. The second tube group 400 includes multiple first water collection pipes 410 and multiple second water collection pipes 420. Vertically, the second water collection pipes 420 are located between the first water collection pipes 410 and the heating pipes 210. The first water collection pipes 410 are connected to multiple second water collection pipes 420 arranged side by side. The first water collection pipes 410 are provided with a second inlet for introducing cooling water, and the circumference of the second water collection pipes 420 is provided with multiple second outlets, which are correspondingly set and welded to the second ends of the heating pipes 210. During the adsorption process, the temperature of the activated carbon will rise. Cooling medium can be introduced into the heating pipe group 210 through the second tube group 400 to remove the heat from the activated carbon.
[0057] It is easy to understand that during the adsorption process, cooling water enters the heating tube 210 from the second tube group 400 and then exits from the first inlet of the first tube group 300; during the desorption process, steam enters the heating tube 210 from the first tube group 300 and then exits from the second inlet of the second tube group 400.
[0058] Furthermore, the tank body 100 is provided with an air inlet pipe 520 and a water inlet pipe 510. The air inlet pipe 520 is detachably connected to the first inlet, and the water inlet pipe 510 is detachably connected to the second inlet. The air inlet pipe 520 is used to connect to an external pipeline for supplying steam; the water inlet pipe 510 is used to connect to an external pipeline for supplying cooling water. The detachable connection between the air inlet pipe 520 and the first inlet does not restrict the air inlet pipe 520 from directly connecting to the first inlet. In some embodiments, such as... Figure 2 and Figure 4 As shown, a connecting pipe 350 is also connected to the first air distribution pipe 310. One end of the connecting pipe 350 is connected to the first inlet and welded to the first air distribution pipe 310, while the other end of the connecting pipe 350 is connected to the air inlet pipe 520 and detachably connected, thereby enabling a detachable connection between the air inlet pipe 520 and the first inlet in the first air distribution pipe 310. The water inlet pipe 510 and the first water collection pipe 410 can also be detachably connected in the same way.
[0059] Since the air inlet pipe 520 is detachably connected to the first inlet and the water inlet pipe 510 is detachably connected to the second inlet, it is easy to install or remove the first pipe assembly 300, the tube assembly and the second pipe assembly 400 into the tank 100 as a whole.
[0060] In some embodiments, a support plate 610 is provided circumferentially on the inner wall of the tank 100, and the tube assembly is hung on the support plate 610.
[0061] Furthermore, the support plate 610 is also connected to a collar 620, which is located on the outside of the tube assembly. During use, activated carbon is also placed on the inside of the collar 620, and the gap between the outer heating tube 210 and the collar 620 in the tube assembly is filled with activated carbon. The distance between the outer heating tube 210 and the collar 620 in the tube assembly is less than or equal to 50 mm. Furthermore, the gap between two adjacent heating tubes 210 is also filled with activated carbon, and the distance between two adjacent heating tubes 210 is also less than or equal to 50 mm. In this embodiment, the distance between the activated carbon at all locations and the outer wall of the heating tube 210 does not exceed 50 mm. Therefore, the activated carbon at all locations can effectively exchange heat with the medium inside the heating tube 210.
[0062] Furthermore, the tank 100 is also provided with an air inlet 131 on the lower side and an air outlet 121 on the upper side. The tank 100 is provided with a carbon base plate 700 for supporting activated carbon. The tube assembly is located above the carbon base plate 700. It is easy to understand that, vertically, the carbon base plate 700 is located between the air inlet 131 and the air outlet 121.
[0063] like Figure 2 and Figure 3 In the illustrated embodiment, the tank 100 includes an annular tank wall 110, an upper tower cover 120 connected above the tank wall 110, and a lower tower cover 130 connected below the tank wall 110. The upper tower cover 120, the tank wall 110, and the lower tower cover 130 form a cavity for installing the first tube group 300, the tube assembly, and the second tube group 400. An air inlet 131 is located on the lower tower cover 130, and an air outlet 121 is located on the upper tower cover 120. A nitrogen inlet 122 is also provided on the upper tower cover 120.
[0064] During the adsorption process, the waste gas to be treated enters the tank 100 from the inlet 131, then passes through the carbon bottom plate 700 and is treated by activated carbon. The treated gas is then discharged from the outlet 121. Cooling water enters the second tube group 400 from the second inlet, then passes through the tube assembly and the first tube group 300 in sequence before flowing out from the first outlet.
[0065] During the desorption process, the tank 100 is first evacuated, then nitrogen is injected into the tank 100 through the nitrogen port 122, and then steam is introduced into the first tube group 300 so that the activated carbon can be heated to 115°C quickly. The steam pressure can be greater than 0.1 MPa, such as 0.4 MPa.
[0066] When equipment maintenance is required, the upper tower cover 120 can be removed, the connection between the air inlet pipe 520 and the first air distribution pipe 310 can be disconnected, and the connection between the water inlet pipe 510 and the first water collection pipe 410 can be disconnected. Then, a crane can be used to lift the first pipe group 300, the tube assembly and the second pipe group 400, which are connected as a whole, out of the tank 100 for maintenance. Alternatively, the first pipe group 300, the tube assembly and the second pipe group 400 can be replaced as a whole, making maintenance more convenient.
[0067] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An activated carbon adsorption regeneration tower, characterized in that, The device includes a tank body, within which a tube assembly is installed. The tube assembly includes multiple vertically arranged heating tubes, each with an inner diameter of less than 50 mm. Activated carbon is placed between the heating tubes. A first tube group is welded to the top of the tube assembly. The first tube group includes multiple first gas distribution tubes and multiple second gas distribution tubes. Each first gas distribution tube and each second gas distribution tube is horizontally arranged and has a volume of less than 25 L. Vertically, the second gas distribution pipe is located between the first gas distribution pipe and the heating pipe, and each of the first gas distribution pipes is connected to multiple second gas distribution pipes; the first gas distribution pipe has a first inlet for introducing steam, and the second gas distribution pipe has multiple first outlets spaced axially upward, with each first outlet corresponding to and welded to the first end of the heating pipe.
2. The activated carbon adsorption regeneration tower according to claim 1, characterized in that, The first tube assembly also includes multiple third gas distribution tubes, each with a volume of less than 25L. The third gas distribution tubes are horizontally arranged and vertically positioned between the first gas distribution tubes and the third gas distribution tubes. Each first gas distribution tube connects to multiple third gas distribution tubes, and each third gas distribution tube connects to multiple second gas distribution tubes. The number of second gas distribution tubes is greater than the number of third gas distribution tubes, and the number of third gas distribution tubes is greater than the number of first gas distribution tubes.
3. The activated carbon adsorption regeneration tower according to claim 2, characterized in that, The outer diameter of the second gas distribution pipe is not less than the outer diameter of the heating pipe, the outer diameter of the third gas distribution pipe is not less than the outer diameter of the second gas distribution pipe, and the outer diameter of the first gas distribution pipe is not less than the outer diameter of the third gas distribution pipe.
4. The activated carbon adsorption regeneration tower according to claim 2, characterized in that, The upper side of the third air distribution pipe is connected to multiple first vertical pipes, and the first vertical pipes are connected to the first air distribution pipes one by one, so that each first air distribution pipe is connected to the same third air distribution pipe. The lower side of the third air distribution pipe is connected to multiple second vertical pipes, and the second vertical pipes are connected to the second air distribution pipes in a one-to-one correspondence, so that each second air distribution pipe is connected to the same third air distribution pipe. The inner diameter of the first vertical pipe is larger than the inner diameter of the second vertical pipe.
5. The activated carbon adsorption regeneration tower according to claim 1, characterized in that, Below the tube assembly, a second tube group is also connected; the second tube group includes multiple first water collection pipes and multiple second water collection pipes. Vertically, the second water collection pipes are located between the first water collection pipes and the heating pipes; the first water collection pipes are connected to multiple second water collection pipes arranged side by side; the first water collection pipes are provided with a second inlet for introducing cooling water, and the circumferential surface of the second water collection pipes is provided with multiple second outlets, and the second outlets are correspondingly provided and welded to the second ends of the heating pipes.
6. The activated carbon adsorption regeneration tower according to claim 5, characterized in that, The tank is equipped with an air inlet pipe and a water inlet pipe. The air inlet pipe is detachably connected to the first inlet, and the water inlet pipe is detachably connected to the second inlet.
7. The activated carbon adsorption regeneration tower according to claim 1, characterized in that, A support plate is provided circumferentially on the inner wall of the tank, and the tube assembly is hung on the support plate.
8. The activated carbon adsorption regeneration tower according to claim 7, characterized in that, The spacing between two adjacent heating tubes is less than or equal to 50 mm; the support plate is connected to a collar, the tube assembly is located inside the collar, and the minimum distance between the heating tube on the outer side and the inner side of the collar is less than or equal to 50 mm.
9. The activated carbon adsorption regeneration tower according to claim 1, characterized in that, The tank is provided with an air inlet on the lower side and an air outlet on the upper side. A carbon base plate for supporting activated carbon is provided inside the tank, and the tube assembly is located above the carbon base plate.
10. A chemical waste gas treatment system, characterized in that, Includes the activated carbon adsorption regeneration tower according to any one of claims 1-9.