Multistage adsorption tower of moving bed

Abstract

The utility model provides a multi-stage adsorption tower of a moving bed, which comprises a charging mechanism, an adsorption mechanism and a discharging mechanism, an annular adsorption material layer is arranged in a cavity of the adsorption mechanism and divides the cavity into an inner layer cavity and an outer layer cavity, the middle part of the adsorption material layer is a gas blocking section which is used for preventing flue gas from directly penetrating through; the inner-layer cavity or the outer-layer cavity is divided by the partition plate to form a double-layer structure which is not directly communicated, so that a two-stage cross-flow type flue gas flowing path is formed in the cavity, a flue gas inlet and a flue gas outlet of the adsorption mechanism can be communicated, and the flowing direction of flue gas is changed for multiple times along the two-stage cross-flow type flue gas flowing path; the contact area and the contact time of the flue gas and the adsorbent are increased, the purification efficiency is improved, and invalid adsorbent retention areas are reduced. The charging mechanism adds new adsorbents into the adsorption mechanism, and the discharging mechanism receives the adsorbents which are discharged from the adsorption mechanism and are saturated in adsorption, so that the adsorbents can be continuously supplemented and discharged, and the effectiveness of the adsorbents in the adsorption mechanism is maintained.

Description

Technical Field

[0001] This utility model relates to the field of industrial flue gas purification technology, and in particular to a multi-stage adsorption tower with a moving bed. Background Technology

[0002] In moving bed-based solid adsorption (or absorption) technology for removing pollutants from flue gas, the adsorption tower is the core equipment. Adsorption towers can be classified into counter-current and cross-flow types based on the different flow contact methods between the flue gas and the adsorbent. However, to ensure uniform flow of the adsorbent and uniform distribution of the flue gas, it is often necessary to design relatively complex feeding and discharging structures, adsorbent distribution devices, and flue gas uniform distribution devices. However, this presents the following technical problems: the overall structure is complex and cumbersome, leading to an increase in ineffective adsorbent retention areas, increasing the amount of adsorbent used and unnecessary losses, and occupying a significant amount of unused space, resulting in a large footprint. Simultaneously, the complex structure makes it difficult to effectively insulate the adsorption tower, especially in low-temperature adsorption environments requiring cooling, significantly increasing operating energy consumption.

[0003] In view of the above, this utility model is hereby proposed. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage adsorption tower with a moving bed, addressing the shortcomings of existing adsorption tower designs, such as complex and cumbersome overall structures, which lead to an increase in ineffective adsorbent retention zones, increased adsorbent usage, and unnecessary losses. The preferred technical solutions provided by this invention offer numerous technical benefits, detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This utility model provides a multi-stage adsorption tower with a moving bed, including a loading mechanism, an adsorption mechanism, and a discharge mechanism. The adsorption mechanism has an annular adsorption material layer inside its cavity, dividing the cavity into an inner cavity and an outer cavity. The middle section of the adsorption material layer is a gas-blocking section to prevent direct passage of flue gas. A partition separates the inner or outer cavity into a non-directly connected double-layer structure, creating a two-stage cross-flow flue gas path within the cavity, connecting the inlet and outlet of the adsorption mechanism. The inlet end of the adsorption material layer is connected to the loading mechanism, and the outlet end is connected to the discharge mechanism.

[0007] Preferably, the bottom of the loading mechanism is provided with an annular loading plate, the loading plate including a feeding channel and a smoke outlet channel, the feeding channel and the smoke outlet channel being arranged alternately in sequence;

[0008] The top of the discharge mechanism is provided with an annular discharge plate, which includes a discharge channel and a smoke inlet channel, and the discharge channel and the smoke inlet channel are arranged alternately in sequence.

[0009] The adsorbent layer includes a first purification section, an air-blocking section, and a second purification section connected sequentially from bottom to top. The discharge end of the first purification section is connected to the discharge mechanism through the discharge channel, and the feed end of the second purification section is connected to the loading mechanism through the feed channel.

[0010] The gas blocking section separates the inner cavity into a lower inner cavity and an upper inner cavity that are not directly connected by a partition. The smoke inlet is connected to the lower inner cavity through the smoke inlet channel, and the upper inner cavity is connected to the smoke outlet through the smoke outlet. A two-stage cross-flow flue gas flow path is formed between the lower inner cavity, the first purification section, the outer cavity, the second purification section, and the upper inner cavity.

[0011] Preferably, the bottom of the loading mechanism is provided with an annular loading plate, which has an annular feeding channel; the top of the discharging mechanism is provided with an annular discharging plate, which has an annular discharging channel.

[0012] The adsorbent layer includes a first purification section, an air-blocking section, and a second purification section connected sequentially from bottom to top. The discharge end of the first purification section is connected to the discharge mechanism through the discharge channel, and the feed end of the second purification section is connected to the loading mechanism through the feed channel.

[0013] The gas blocking section separates the outer cavity into a lower outer cavity and an upper outer cavity that are not directly connected by a partition. The smoke inlet is connected to the lower outer cavity, and the upper outer cavity is connected to the smoke outlet. A two-stage cross-flow flue gas flow path is formed between the lower outer cavity, the first purification section, the inner cavity, the second purification section, and the upper outer cavity.

[0014] Preferably, the air-blocking section includes a gradually expanding section, a straight section, and a gradually contracting section connected sequentially from bottom to top. The gradually contracting section is connected to the second purification section, and the gradually expanding section is connected to the first purification section.

[0015] Preferably, the first purification plate of the first purification section and the second purification plate of the second purification section are both combinations of grid plates or perforated plates and wire mesh.

[0016] Preferably, the partition is inclined downwards along the direction toward the second purification section and connected to the tapered section, and forms a first gap with the corresponding second purification plate.

[0017] Preferably, the lower part of the first purification section is connected to the inner wall of the cavity through an interceptor plate, and a second gap is formed between the section and the interceptor plate.

[0018] Preferably, the upper part of the second purification section is connected by an interceptor plate to isolate the inner cavity from the smoke outlet.

[0019] Preferably, the adsorption mechanism is a hollow cylindrical structure, and a support is provided at its bottom;

[0020] The discharge mechanism is a hollow inverted cone structure, and a first material level detection switch is installed inside it;

[0021] The feeding mechanism includes a hollow conical part and a cylindrical part connected sequentially from top to bottom, and a plurality of second material level detection switches are provided inside it. The cylindrical part is provided with a flow guide component in the shape of an upright cone.

[0022] Preferably, the material discharge mechanism is provided with a material blocking component.

[0023] Preferably, the system further includes a discharge mechanism, which is disposed within the discharge mechanism and includes a fixed beam, a fixed support plate, a movable rake, and a drive cylinder. The fixed beam is connected to the loading mechanism, the fixed support plate is mounted on the fixed beam and located below the discharge channel to receive the adsorbent discharged from the discharge channel, the movable rake is located above the fixed support plate, and the fixed support plate and the movable rake are correspondingly arranged with respect to the discharge channel. The drive cylinder is used to drive the movable rake to reciprocate radially along the fixed support plate.

[0024] The preferred technical solution of this utility model can also produce at least the following technical effects:

[0025] This invention effectively avoids the defects of existing adsorption tower designs, such as complex and cumbersome overall structures, which lead to an increase in ineffective adsorbent retention areas, increased adsorbent usage, and unnecessary losses. This invention provides a multi-stage moving bed adsorption tower, including a charging mechanism, an adsorption mechanism, and a discharging mechanism. The adsorption mechanism has an annular adsorbent layer within its cavity, dividing the cavity into an inner and outer cavity. A gas-blocking section in the middle of the adsorbent layer prevents direct passage of flue gas. A partition separates the inner or outer cavity into a non-directly connected double-layer structure, creating a two-stage cross-flow flue gas path within the cavity, and connecting the inlet and outlet of the adsorption mechanism. The inlet end of the adsorbent layer is connected to the charging mechanism, and the outlet end is connected to the discharging mechanism. This invention utilizes the synergistic action of a loading mechanism, an adsorption mechanism, and a discharge mechanism. The loading mechanism adds new adsorbent to the adsorbent layer of the adsorption mechanism, which then performs purification. The discharge mechanism receives the adsorbent that has reached adsorption saturation, ensuring continuous replenishment and discharge of the adsorbent and maintaining its effectiveness within the adsorption mechanism. By incorporating a gas-blocking section on the adsorbent layer, a two-stage cross-flow flue gas path is created within the adsorption mechanism. The flue gas changes its flow direction multiple times along this path, increasing the contact area and time between the flue gas and the adsorbent, thereby improving purification efficiency and reducing ineffective adsorbent retention areas. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a multi-stage adsorption tower with a moving bed provided in Embodiment 1 of this utility model;

[0028] Figure 2 yes Figure 1 A cross-sectional view along the AA direction;

[0029] Figure 3 yes Figure 1 A sectional view along the A'-A' direction;

[0030] Figure 4 This is a schematic diagram of the charging mechanism of a multi-stage adsorption tower with a moving bed provided in Embodiment 1 of this utility model;

[0031] Figure 5 This is a schematic diagram of the structure of a multi-stage adsorption tower with a moving bed provided in Embodiment 2 of this utility model;

[0032] Figure 6 yes Figure 5 A magnified view of part B;

[0033] Figure 7 This is a schematic diagram of the structure of a multi-stage adsorption tower with a moving bed provided in Embodiment 3 of this utility model;

[0034] Figure 8 yes Figure 7 A cross-sectional view along the CC direction;

[0035] Figure 9 yes Figure 7 A cross-sectional view along the C'-C' direction.

[0036] In the picture:

[0037] 1. Discharge mechanism; 11. Discharge plate; 12. Discharge channel; 13. Smoke inlet channel; 14. Material blocking assembly; 15. Discharge port; 16. First material level detection switch;

[0038] 2. Adsorption mechanism; 21. Adsorbent layer; 22. First purification section; 221. First purification plate; 222. First sealing plate; 23. Air blocking section; 231. Gradual expansion section; 232. Straight section; 233. Gradual contraction section; 24. Second purification section; 241. Second purification plate; 242. Second sealing plate; 25. Smoke inlet; 26. Smoke outlet; 27. Partition; 28. Interceptor plate; 29. ​​First gap; 210. Second gap; 211. Support;

[0039] 3. Loading mechanism; 31. Conical part; 311. Feed inlet; 32. Cylindrical part; 33. Loading plate; 34. Feed channel; 35. Smoke outlet channel; 36. Flow guide assembly; 37. Low material level detection switch; 38. High material level detection switch;

[0040] 4. Unloading mechanism; 41. Fixed beam; 42. Fixed pallet; 43. Movable rake; 44. Drive cylinder. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0042] Example 1:

[0043] like Figures 1-4As shown, this utility model provides a multi-stage adsorption tower with a moving bed, including a loading mechanism 3, an adsorption mechanism 2, and a discharge mechanism 1. The adsorption mechanism 2 has an annular adsorption material layer 21 in its cavity, which divides the cavity into an inner cavity and an outer cavity. The middle part of the adsorption material layer 21 is a gas-blocking section 23, which is used to prevent flue gas from passing through directly. The inner cavity or the outer cavity is separated by a partition 27 to form a double-layer structure that is not directly connected, so that a two-stage cross-flow flue gas flow path is formed in the cavity, and the inlet 25 and outlet 26 of the adsorption mechanism 2 can be connected. The inlet end of the adsorption material layer 21 is connected to the loading mechanism 3, and the outlet end of the adsorption material layer 21 is connected to the discharge mechanism 1.

[0044] This invention utilizes the synergistic action of a loading mechanism 3, an adsorption mechanism 2, and a discharge mechanism 1. The loading mechanism 3 adds new adsorbent to the adsorption material layer 21 of the adsorption mechanism 2, which then performs purification. The discharge mechanism 1 receives the adsorbent that has reached adsorption saturation in the adsorption mechanism 2, ensuring continuous replenishment and discharge of the adsorbent and maintaining its effectiveness within the adsorption mechanism 2. By setting a gas-blocking section 23 on the adsorption material layer 21, a two-stage cross-flow flue gas flow path is formed within the adsorption mechanism 2. The flue gas changes its flow direction multiple times along this path, increasing the contact area and contact time between the flue gas and the adsorbent, thereby improving purification efficiency and reducing ineffective adsorbent retention areas.

[0045] Furthermore, the bottom of the loading mechanism 3 is provided with an annular loading plate 33, which includes a feeding channel 34 and a smoke outlet channel 35, which are arranged alternately in sequence. The top of the discharging mechanism 1 is provided with an annular discharging plate 11, which includes a discharging channel 12 and a smoke inlet channel 13, which are arranged alternately in sequence. The cavity of the adsorption mechanism 2 is provided with an annular adsorption material layer 21, which divides the cavity into an inner cavity and an outer cavity. The middle part of the adsorption material layer 21 is a gas-blocking section 23. The adsorption material layer 21 includes a first purification section 22, a gas-blocking section 23, and a second purification section 24 connected sequentially from bottom to top. The discharge end of the first purification section 22 is connected to the discharging mechanism 1 through the discharging channel 12, and the feed end of the second purification section 24 is connected to the loading mechanism 3 through the feeding channel 34. The gas blocking section 23 divides the inner cavity into a lower inner cavity and an upper inner cavity that are not directly connected by a partition 27. The smoke inlet 25 is connected to the lower inner cavity through the smoke inlet channel 13, and the upper inner cavity is connected to the smoke outlet 26 through the smoke outlet channel. A two-stage cross-flow flue gas flow path is formed between the lower inner cavity, the first purification section 22, the outer cavity, the second purification section 24, and the upper inner cavity.

[0046] Through the coordinated action of the loading mechanism 3, the adsorption mechanism 2 and the discharge mechanism 1, the loading mechanism 3 adds new adsorbent to the adsorption material layer 21 of the adsorption mechanism 2 through the feeding channel 34, the adsorption mechanism 2 performs purification treatment, and the discharge mechanism 1 receives the adsorbent that has been saturated in the adsorption mechanism 2 through the discharge channel 12, so that the adsorbent can be continuously replenished and discharged to maintain the effectiveness of the adsorbent in the adsorption mechanism 2.

[0047] Furthermore, the design of the annular adsorbent layer 21 ensures high consistency in the thickness of the adsorbent inside and uniform flow velocity across the cross section.

[0048] The gas-blocking section 23, through the partition 27, divides the inner cavity into a lower inner cavity and an upper inner cavity that are not directly connected, thus creating a two-stage cross-flow flue gas path within the adsorption mechanism 2. Specifically, driven by air pressure, the flue gas enters the lower inner cavity through the smoke inlet channel 13 and passes through the first purification section 22. During this process, the flue gas comes into full contact with the adsorbent in the first purification section 22, achieving preliminary purification. Then, with the help of the air pressure difference, the flue gas enters the outer cavity and passes through the second purification section 24. During this process, the flue gas interacts with the adsorbent again, achieving secondary purification. Finally, it enters the upper inner cavity and is discharged from the smoke outlet 26 through the smoke outlet channel 35.

[0049] During the purification process, the flue gas can change its flow direction multiple times, greatly increasing the contact area and contact time between the flue gas and the adsorbent, thereby improving purification efficiency. Simultaneously, it reduces ineffective adsorbent retention areas. This is particularly suitable for applications involving the synergistic removal of multiple pollutants, avoiding competitive adsorption of various pollutants on the adsorbent surface. Strong adsorbates are adsorbed and discharged after being discharged in the first purification section 22, while weak adsorbates are adsorbed and removed upon contact with fresh adsorbent in the second purification section 24.

[0050] Furthermore, such as Figure 2 , Figure 4 As shown, the feeding channels 34 are arranged sequentially at intervals along the circumference of the loading plate 33, and a smoke outlet channel 35 is formed between two adjacent feeding channels 34. The feeding channels 34 connect the loading mechanism 3 and the adsorbent layer 21, and the smoke outlet channel 35 connects the upper inner cavity and the smoke outlet 26. This arrangement can achieve uniform distribution of material flow and airflow without affecting each other.

[0051] like Figure 3 As shown, the structure of the discharge plate 11 is the same as that of the loading plate 33. The discharge channels 12 are arranged sequentially at intervals along the circumference of the discharge plate 11, and a smoke inlet channel 13 is formed between two adjacent discharge channels 12. The discharge channels 12 connect the adsorbent layer 21 and the discharge mechanism 1, and the smoke inlet channel 13 connects the smoke inlet 25 and the lower inner cavity. This arrangement can achieve uniform distribution of material flow and airflow without mutual interference.

[0052] As an optional implementation, the air-blocking section 23 includes a gradually expanding section 231, a straight section 232 and a gradually contracting section 233 connected sequentially from bottom to top. The gradually contracting section 233 is connected to the second purification section 24, and the gradually expanding section 231 is connected to the first purification section 22.

[0053] Furthermore, the gas barrier plate of the gas barrier section 23 is a closed plate without pores, preventing flue gas from passing through directly.

[0054] With this configuration, the flow resistance of the flue gas will increase significantly during the flow process because the flow cross-sectional area of ​​the straight section 232 is relatively small. Most of the flue gas will travel laterally between the lower inner cavity, the first purification section 22 and the outer cavity, instead of directly passing through the gas-blocking section 23 to reach the second purification section 24.

[0055] As an optional implementation, the first purification plate 221 of the first purification section 22 and the second purification plate 241 of the second purification section 24 are both combinations of grid plates or perforated plates and wire mesh.

[0056] The specific specifications of the grating, perforated plate, and wire mesh can be designed according to the particle size of the adsorbent. It should be noted that the combination of the grating, perforated plate, and wire mesh adopts existing technology. As long as sufficient support strength is provided, the flowing adsorbent can be confined within the adsorbent layer 21, and the flue gas can pass smoothly through the first purification section 22 and the second purification section 24, and be fully adsorbed and purified by the adsorbent, it is sufficient. Further details are omitted here.

[0057] As an optional implementation, the partition 27 is inclined downward in the direction toward the second purification section 24 and connected to the air barrier plate of the tapered section 233, and forms a first gap 29 between it and the corresponding second purification plate 241.

[0058] Furthermore, the baffle 27 is positioned close to the outlet direction of the second purification section 24. The cross-section of the baffle 27 is an inverted V-shape, and both ends are connected to the two tapered sections 233 respectively, forming a first gap 29 between it and the corresponding second purification plate 241.

[0059] The tilt angle of the partition 27 can be designed according to the static packing angle of the adsorbent.

[0060] This design takes into account that some broken adsorbent may float out from the gaps in the second purification plate 241 and accumulate at the first gap 29. As the adsorbent moves, it can re-enter the adsorbent layer 21, avoiding sludge accumulation and blockage.

[0061] As an optional implementation, the first sealing plate 222 at the lower part of the first purification section 22 is connected to the inner wall of the cavity through the intercepting plate 28, and a second gap 210 is formed between the sealing plate 222 and the intercepting plate 28.

[0062] Furthermore, the interceptor plate 28 is positioned close to the air outlet direction of the first purification section 22.

[0063] This design takes into account that some broken adsorbent will float out from the gaps in the first purification plate 221 and accumulate at the second gap 210. As the adsorbent moves, it can re-enter the adsorbent layer 21, avoiding sludge accumulation and blockage.

[0064] As an optional implementation, the adsorption mechanism 2 has a hollow cylindrical structure, which is more conducive to flue gas flow, reduces dead zones, and promotes more uniform distribution of flue gas. Furthermore, the bottom of the adsorption mechanism 2 is supported by a support 211, reducing the overall weight and lowering manufacturing and maintenance costs.

[0065] The material discharge mechanism 1 is a hollow inverted cone structure, and a first material level detection switch 16 is installed inside it.

[0066] The loading mechanism 3 includes a hollow conical part 31 and a cylindrical part 32 connected sequentially from top to bottom, and a plurality of second material level detection switches are provided inside it. The cylindrical part 32 is provided with a flow guide component 36 in an upright conical shape.

[0067] Furthermore, the function of the first material level detection switch 16 is to detect the remaining amount of adsorbent in the discharge mechanism 1 and discharge the material in a timely manner.

[0068] The conical part 31 has an upright conical structure, and a feed inlet 311 is opened at the tip to avoid adsorbent accumulation, reduce ineffective loading of adsorbent, and improve adsorbent utilization. The flow guiding component 36 is correspondingly arranged with the feed inlet 311 of the loading mechanism 3 to facilitate the uniform distribution of adsorbent.

[0069] The second material level detection switch includes a low material level detection switch 37 and a high material level detection switch 38, with the low material level detection switch 37 located below the high material level detection switch 38. The low material level detection switch 37 detects the remaining amount of adsorbent in the loading mechanism 3 and replenishes it promptly. The high material level detection switch 38 detects whether there is an excess of adsorbent in the loading mechanism 3, stopping replenishment as needed. The cooperation of the low material level detection switch 37 and the high material level detection switch 38 ensures that a certain thickness of adsorbent is always maintained within the loading mechanism 3.

[0070] The outer walls of the loading mechanism 3, the adsorption mechanism 2, and the loading mechanism 3 are relatively neat and regular, which facilitates the addition of thermal insulation structures. Especially in low-temperature adsorption environments where cold preservation is required, a good thermal insulation structure can significantly reduce operating energy consumption.

[0071] As an optional implementation, a material blocking component 14 is provided in the material discharge mechanism 1.

[0072] Furthermore, the baffle assembly 14 has a frustum-shaped structure, and its inner diameter gradually increases from top to bottom.

[0073] The adsorbent discharged through the discharge channel 12 is blocked by the outer wall of the baffle assembly 14 and evenly distributed along its outer wall in the discharge mechanism 1, and then discharged from the discharge port 15 at its bottom, thus offsetting the central flow phenomenon and achieving uniform discharge.

[0074] Example 2:

[0075] The difference between Example 2 and Example 1 is as follows: Figure 5 , Figure 6 The system also includes a discharge mechanism 4, which is located within the discharge mechanism 1. The discharge mechanism 4 includes a fixed beam 41, a fixed support plate 42, a movable rake 43, and a drive cylinder 44. The fixed beam 41 is connected to the loading mechanism 3. The fixed support plate 42 is mounted on the fixed beam 41 and located below the discharge channel 12, serving to receive the adsorbent discharged from the discharge channel 12. The movable rake 43 is located above the fixed support plate 42, and the fixed support plate 42 and the movable rake 43 are correspondingly arranged with respect to the discharge channel 12. The drive cylinder 44 drives the movable rake 43 to reciprocate radially along the fixed support plate 42.

[0076] Furthermore, the fixed pallet 42 and the movable rake 43 are both integrated structural designs, and are respectively set for all the discharge channels 12.

[0077] When unloading is required, the adsorbent discharged from each discharge channel 12 is caught by the fixed pallet 42. Subsequently, the drive cylinder 44 is activated, pushing the movable rake 43 to move radially back and forth along the fixed pallet 42, rake the adsorbent remaining on the fixed pallet 42 off, and make it fall into the hopper of the loading mechanism 3, thereby improving the discharge efficiency, which is especially suitable for adsorbents with poor flowability.

[0078] The discharge volume and discharge rate can be flexibly controlled by adjusting the operating frequency of the drive cylinder 44.

[0079] Example 3:

[0080] The difference between Example 3 and Example 1 is that, as Figure 7 As shown, the gas blocking section 23 separates the outer cavity through the baffle 27 to form a lower outer cavity and an upper outer cavity that are not directly connected. A two-stage cross-flow flue gas flow path is formed between the lower outer cavity, the first purification section 22, the inner cavity, the second purification section 24 and the upper outer cavity.

[0081] like Figure 8 As shown, the bottom of the loading mechanism 3 is provided with an annular loading plate 33, and the annular loading plate 33 has a feeding channel 34.

[0082] like Figure 9As shown, the top of the discharge mechanism 1 is provided with an annular discharge plate 11, and the annular discharge plate 11 has an annular discharge channel 12.

[0083] The discharge end of the first purification section 22 is connected to the discharge mechanism 1 through the discharge channel 12, and the feed end of the second purification section 24 is connected to the loading mechanism 3 through the feed channel 34. The smoke inlet 25 is connected to the lower outer cavity, and the upper outer cavity is connected to the smoke outlet 26.

[0084] The gas-blocking section 23, through the partition 27, separates the outer cavity into a lower outer cavity and an upper outer cavity that are not directly connected, thus creating a two-stage cross-flow flue gas path within the adsorption mechanism 2. Specifically, driven by air pressure, the flue gas enters the lower outer cavity and passes through the first purification section 22. During this process, the flue gas comes into full contact with the adsorbent in the first purification section 22, achieving preliminary purification. Then, with the help of the air pressure difference, the flue gas enters the inner cavity and passes through the second purification section 24. During this process, the flue gas interacts with the adsorbent again, achieving secondary purification. Finally, with the help of the air pressure difference, it enters the upper outer cavity and is discharged from the flue gas outlet 26.

[0085] During the purification process, the flue gas can change its flow direction multiple times, which greatly increases the contact area and contact time between the flue gas and the adsorbent, thereby improving the purification efficiency. At the same time, it also reduces the ineffective adsorbent retention area.

[0086] Furthermore, compared to Example 1, the flue gas flow path in this example is simpler and the structural complexity is further reduced, making it particularly suitable for application scenarios where the uniformity of airflow distribution is not of paramount importance.

[0087] As an optional implementation, one end of the partition 27 is connected to the inner wall of the cavity, and the other end is inclined downward in the direction toward the second purification section 24 and connected to the tapered section 233, and forms a first gap 29 with the corresponding second purification plate 241; the upper part of the second purification section 24 is connected by the interceptor plate 28.

[0088] Furthermore, the baffle 27 is positioned close to the air outlet direction of the second purification section 24.

[0089] This design takes into account that some broken adsorbent will float out from the gaps in the second purification plate 241 and accumulate at the first gap 29, so that it can re-enter the adsorbent layer 21 as the adsorbent moves.

[0090] As an optional implementation, the second sealing plates 242 at the top of the second purification section 24 are connected by an interceptor plate 28 to isolate the inner cavity from the smoke outlet 26, so that only the flue gas purified by the second purification section 24 can enter the upper outer cavity and finally be discharged from the smoke outlet 26.

[0091] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0092] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0093] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0094] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "a particular example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0095] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A multi-stage adsorption column of a moving bed, characterized by, The device comprises a loading mechanism, an adsorption mechanism and a discharging mechanism, the cavity of the adsorption mechanism is provided with an annular adsorption material layer, and the cavity is divided into an inner layer cavity and an outer layer cavity by the adsorption material layer, the middle part of the adsorption material layer is a gas blocking section for preventing flue gas from directly passing through, and the inner layer cavity or the outer layer cavity is divided into a double-layer structure not directly connected by a partition plate, so that two-stage cross-flow flue gas flow paths are formed in the cavity, and the flue gas inlet and the flue gas outlet of the adsorption mechanism are connected; the feeding end of the adsorption material layer is connected with the loading mechanism, and the discharging end of the adsorption material layer is connected with the discharging mechanism; the bottom of the loading mechanism is provided with an annular loading plate, the loading plate comprises a feeding channel and a flue gas outlet channel, and the feeding channel and the flue gas outlet channel are arranged alternately; the top of the discharging mechanism is provided with an annular discharging plate, the discharging plate comprises a discharging channel and a flue gas inlet channel, and the discharging channel and the flue gas inlet channel are arranged alternately; the adsorption material layer comprises a first purification section, a gas blocking section and a second purification section connected in sequence from bottom to top, the discharging end of the first purification section is connected with the discharging mechanism through the discharging channel, and the feeding end of the second purification section is connected with the loading mechanism through the feeding channel; the gas blocking section divides the inner layer cavity into a lower inner cavity and an upper inner cavity not directly connected by a partition plate, the flue gas inlet is connected with the lower inner cavity through the flue gas inlet channel, the upper inner cavity is connected with the flue gas outlet through the flue gas outlet channel, and two-stage cross-flow flue gas flow paths are formed between the lower inner cavity, the first purification section, the outer layer cavity, the second purification section and the upper inner cavity.

2. A multi-stage adsorption column with a moving bed according to claim 1, characterized in that, The bottom of the loading mechanism is provided with an annular loading plate, and the loading plate has an annular feeding channel; the top of the discharging mechanism is provided with an annular discharging plate, and the annular discharging plate has an annular discharging channel; The adsorption material layer comprises a first purification section, a gas blocking section and a second purification section connected in sequence from bottom to top, the discharging end of the first purification section is connected with the discharging mechanism through the discharging channel, and the feeding end of the second purification section is connected with the loading mechanism through the feeding channel; The gas blocking section divides the outer layer cavity into a lower outer cavity and an upper outer cavity not directly connected by a partition plate, the flue gas inlet is connected with the lower outer cavity, the upper outer cavity is connected with the flue gas outlet, and two-stage cross-flow flue gas flow paths are formed between the lower outer cavity, the first purification section, the inner layer cavity, the second purification section and the upper outer cavity.

3. A mobile-bed multi-stage adsorption column according to claim 1 or 2, characterised in that, The gas blocking section comprises a gradually expanding section, a straight section and a gradually shrinking section connected in sequence from bottom to top, the gradually shrinking section is connected with the second purification section, and the gradually expanding section is connected with the first purification section.

4. A mobile bed multi-stage adsorption column according to claim 3, characterized in that, The first purification plate of the first purification section and the second purification plate of the second purification section are both combinations of grid plates or hole plates and wire meshes.

5. A mobile bed multi-stage adsorption column according to claim 4, characterized in that, The partition plate is arranged to be inclined downward in the direction towards the second purification section, is connected with the gradually shrinking section, and forms a first gap between the corresponding second purification plate.

6. A mobile bed multi-stage adsorption column according to claim 1, characterized in that, The lower part of the first purification section is connected with the inner wall of the cavity through an intercepting plate, and a second gap is formed between the intercepting plate.

7. A mobile bed multi-stage adsorption column according to claim 2, characterized in that, The upper part of the second purification section is connected by an intercepting plate to separate the inner cavity from the smoke outlet.

8. A mobile-bed multi-stage adsorption column according to claim 1 or 2, characterized in that, The adsorption mechanism is a hollow cylindrical structure, and a support is arranged at the bottom of the adsorption mechanism. The discharging mechanism is a hollow inverted conical structure, and a first material level detection switch is arranged inside the discharging mechanism. The charging mechanism comprises a hollow conical part and a cylindrical part which are sequentially connected from top to bottom, and a plurality of second material level detection switches are arranged inside the charging mechanism, and the cylindrical part is provided with a vertical conical flow guide component.

9. A mobile bed multi-stage adsorption column according to claim 8, characterized in that, The discharging mechanism is arranged in the discharging mechanism, comprising a fixed beam, a fixed supporting plate, a movable rake and a driving cylinder, the fixed beam is connected with the charging mechanism, the fixed supporting plate is installed on the fixed beam and located below the discharging channel to receive the adsorbent discharged from the discharging channel, the movable rake is located above the fixed supporting plate, and the fixed supporting plate and the movable rake are arranged correspondingly with the discharging channel, and the driving cylinder is used to drive the movable rake to move reciprocally along the radial direction of the fixed supporting plate.

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