Adsorbent regenerator and low temperature adsorption regeneration system

Abstract

The application discloses an adsorbent regenerator and a low-temperature adsorption regeneration system. The adsorbent regenerator comprises a tower body, a material falling assembly and a baffle assembly. The inner cavity of the tower body comprises a distribution section and a heating section below the distribution section. The distribution section is located at the top of the inner cavity of the tower body. The heating section is used for heating the adsorbent to desorb and regenerate the adsorbent. The material falling assembly comprises a plurality of material falling pipes. The material falling assembly is arranged in the heating section. The adsorbent entering the heating section from the distribution section falls through the material falling pipes. The baffle assembly is arranged in the heating section and comprises a plurality of baffles. The baffles are arranged obliquely relative to the axial direction of the material falling pipes. The plurality of baffles are arranged in the heating section at intervals. The baffles are used for guiding the flow of the heating medium in the heating section to heat the adsorbent in the material falling pipes in the heating section to desorb and regenerate the adsorbent. The adsorbent regenerator disclosed by the application can reduce the flow resistance of the heat exchange medium and reduce the flow dead zone area.

Description

Technical Field

[0001] This invention belongs to the field of flue gas purification technology, specifically relating to an adsorbent regeneration tower and a low-temperature adsorption regeneration system. Background Technology

[0002] Carbon-based adsorption and removal technology for flue gas pollutants can achieve integrated desulfurization and denitrification, while efficiently removing unconventional pollutants such as SO3, heavy metals, and VOCs. The regeneration tower is one of the key pieces of equipment in the carbon-based adsorption and removal system for flue gas pollutants. It is used to regenerate the deactivated adsorbent after adsorbing pollutants, restoring its activity for recycling.

[0003] In related technologies, a vertical shell-and-tube thermal regeneration tower is used to regenerate deactivated adsorbents. The adsorbent flows through the tubes, while the heat exchange medium flows through the shell. By setting baffles on the shell side to change the flow path of the heat exchange medium, the heat exchange effect can be improved. However, the baffles cause the heat exchange medium to impact the inner wall of the regeneration tower and the feed pipe laterally, resulting in greater flow resistance of the heat exchange medium and higher power consumption during transport. In addition, the heat exchange medium also has back-and-forth flow detours, with large flow dead zones near the detour points, forming large ineffective heat exchange zones and poor heat uniformity of the adsorbent. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes an adsorbent regeneration tower that can reduce the flow resistance of the heating medium, decrease the dead zone area, and improve the regeneration effect.

[0005] The present invention also proposes a low-temperature adsorption and regeneration system.

[0006] The adsorbent regeneration tower of the present invention comprises:

[0007] The tower body has an inner cavity comprising a cloth section and a heating section located below the cloth section. The cloth section is located at the top of the inner cavity of the tower body, and the heating section is used to heat the adsorbent to desorb and regenerate the adsorbent.

[0008] A material discharge assembly, comprising multiple material discharge pipes, is disposed within the heating section, through which the adsorbent entering the heating section from the fabric section falls.

[0009] A flow-blocking assembly is provided within the heating section and includes multiple flow-blocking plates. The flow-blocking plates are inclined relative to the axial direction of the discharge pipe. The multiple flow-blocking plates are spaced apart from each other within the heating section to guide the heating medium to flow within the heating section to heat the adsorbent in the discharge pipe within the heating section, thereby causing the adsorbent to desorb and regenerate.

[0010] The adsorbent regeneration tower of the present invention, through the inclined baffles arranged at intervals, enables the heating medium to flow obliquely towards the feed pipe and the inner wall of the tower, thereby reducing the flow resistance of the heating medium, extending the flow time and smoothness of the heating medium, and reducing the power consumption of the heating medium. In addition, the inclined baffles arranged at intervals can avoid the back-and-forth obstruction and sharp turning of the heating medium, reduce the dead zone area of ​​the flow, make the flow of the heating medium more uniform, and make the adsorbent in each feed pipe more uniformly heated, resulting in higher overall heat transfer efficiency and thus improving the quality of adsorbent desorption and regeneration.

[0011] Optionally, the inner cavity of the tower body further includes a cooling section, which is located at the bottom of the inner cavity of the tower body. The material feeding assembly and the baffle assembly are also disposed in the cooling section. The adsorbent after desorption and regeneration in the heating section enters the cooling section and falls through the material feeding pipe in the cooling section. The baffle plate in the cooling section is used to guide the cooling medium to flow in the cooling section to cool the adsorbent in the material feeding pipe in the cooling section.

[0012] In this invention, the tower body is equipped with a cooling section, which allows the regenerated adsorbent to exchange heat with the cooling medium, thereby lowering the adsorbent's temperature and facilitating its delivery to the adsorbent for flue gas adsorption and purification. Preferably, the adsorbent can be cooled to a temperature below room temperature, allowing it to be directly delivered into the adsorption tower for low-temperature adsorption of the flue gas. This eliminates the need for additional cooling equipment, such as a spray cooling tower, to cool the flue gas to a low temperature, reducing the number of devices and lowering costs. Of course, in this invention, the adsorbent may not need to be cooled to a low temperature; it can simply be cooled to a temperature suitable for adsorption and purification. Low-temperature adsorption of the flue gas within the adsorption tower is achieved by cooling the flue gas to a low temperature.

[0013] Optionally, the inner cavity of the tower body further includes a preheating section, which is located between the material distribution section and the heating section. The material discharge assembly and the baffle assembly are also located in the preheating section. The adsorbent entering the preheating section from the material distribution section enters the preheating section and falls into the heating section through the material discharge pipe in the preheating section. The baffle plate in the preheating section is used to guide the flow of the preheating medium in the preheating section to preheat the adsorbent in the material discharge pipe in the preheating section.

[0014] In this invention, the tower body is equipped with a preheating section, which allows the adsorbent to be heated before entering the heating section. This reduces the temperature rise of the adsorbent in the heating section, thus balancing the temperature difference between different areas in the entire heating section. This ensures that the overall temperature in the heating section can be stably maintained within the temperature range required for adsorbent regeneration. Considering the preheating section and the heating section as a whole for heating the adsorbent, compared to related technologies that only have a heating section for heating the adsorbent, this invention can improve the overall calorific value utilization rate of the preheating medium and the heating medium by more than 10%. The baffle components and material feeding components in the preheating section and the heating section achieve the same effect, which will not be described in detail here.

[0015] Optionally, the multiple baffles of the baffle assembly are divided into multiple groups of baffle units, and the multiple groups of baffle units are arranged at intervals along a first direction. The multiple baffles in each group of baffle units are arranged at intervals along a second direction orthogonal to the first direction to guide the corresponding medium between two adjacent baffles to flow along the inclined direction of the baffle.

[0016] In this invention, by grouping the baffles, the arrangement of the baffles can be based on various factors such as the position of multiple baffle units in the tower body, the uniformity of the heat exchange medium, and factors that interfere with the flow of the heat exchange medium. This facilitates the adjustment of the spacing between baffles located in the same group of baffle units and the tilt angle of each baffle.

[0017] Optionally, the first direction is the axial direction of the discharge pipe, and multiple baffles in each baffle unit are equally spaced and arranged in parallel.

[0018] In this invention, multiple sets of baffle units are arranged at intervals along the axial direction of the feed pipe. The heat exchange medium undergoes multiple stages of direction change and uniform flow within the intervals divided by the multiple sets of baffle units, so that the adsorbent passes through multiple intervals in the feed pipe to complete uniform heat exchange, and at the same time, it is easier to arrange the baffles.

[0019] Optionally, in each set of baffle units, at least some of the baffles have an inclination direction different from that of the other baffles.

[0020] Alternatively, multiple baffles in each set of baffle units may have the same tilt direction, and in multiple sets of baffle units, at least some baffles in the baffle units may have a different tilt direction than the baffles in other baffle units.

[0021] In this invention, the inclination directions of multiple baffles located in the same baffle unit can be different. Adjacent baffles with different inclination directions form a guide space with varying opening and closing degrees, allowing the heat exchange medium to be redistributed within the baffle unit area, thus improving the uniformity of the heat exchange medium. By using the different inclination directions of the baffles in different baffle units, the heat exchange medium has opposite flow directions after passing through different baffle units. Since there is a buffer space between two adjacent baffle units, there will be no baffle collision or flow dead zone.

[0022] Optionally, the multiple baffles in the baffle assembly are divided into multiple baffle units, and the multiple baffle units are arranged at intervals along the axial direction of the discharge pipe. The baffles in the baffle unit are arranged at intervals and in parallel along a direction orthogonal to the axial direction of the discharge pipe to guide the corresponding medium between two adjacent baffles to flow along the inclined direction of the baffle.

[0023] In at least two sets of baffle units, the baffles are arranged at an angle.

[0024] In this invention, the baffles in at least two sets of baffle units are arranged at a certain angle to guide the corresponding medium between adjacent baffles to flow along the inclined direction of the baffles. This allows the flow direction of the heat exchange medium to change when passing through different baffle units, which can prevent the adsorbent in the same feed pipe from always exchanging heat with the same part of the heat exchange medium and improve the fluidity of the heat exchange medium.

[0025] Optionally, the baffle unit is at least three sets, and the baffles in the at least three sets are arranged at an angle to guide the corresponding medium to flow spirally along the axial direction of the discharge pipe.

[0026] In this invention, by arranging the baffles in at least three sets of baffle units at an angle, the travel distance of the heat exchange medium can be extended, the flow of the heat exchange medium can be improved, and the medium flow can be made smooth by means of the inclined arrangement of baffles.

[0027] Optionally, the bottom surface of the heating section is an inclined surface, and an ash discharge section is provided on the heating section. The ash discharge section is located at the lower end of the bottom surface of the heating section to discharge the debris that settles in the heating section.

[0028] In this invention, the inclined bottom surface can cooperate with the inclined baffle plate to allow dust and other impurities in the heating medium to slide off and gather. The heating medium may contain impurities, reducing the requirements for the cleanliness of the heating medium and expanding the range of selectable heating media.

[0029] The low-temperature adsorption regeneration system of the present invention includes:

[0030] An adsorption tower has a flue gas inlet and a flue gas outlet. Low-temperature flue gas below room temperature enters the adsorption tower from the flue gas inlet to be adsorbed and purified by the adsorbent in the adsorption tower. The flue gas purified by adsorption is discharged from the flue gas outlet.

[0031] A regeneration tower, wherein the regeneration tower is an adsorbent regeneration tower as described above, the regeneration tower being connected to the adsorption tower for regenerating the adsorbent discharged from the adsorption tower that has reached adsorption saturation and returning the regenerated adsorbent back into the adsorption tower; and

[0032] A cooling tower, connected to the adsorption tower, is used to cool the flue gas to a low temperature below room temperature and deliver it to the flue gas inlet of the adsorption tower.

[0033] The low-temperature adsorption regeneration system of this invention can reduce the flow resistance of the heating medium, decrease the dead zone area, and improve the regeneration effect of the adsorbent. Furthermore, this system can also cool the high-temperature flue gas to below room temperature, allowing the adsorbent in the adsorption tower to contact the flue gas in a sub-room environment, achieving low-temperature adsorption. Compared to the activity of the adsorbent at high temperatures, the activity of the adsorbent under sub-room temperature adsorption conditions can be increased by tens or even hundreds of times. Therefore, the purification efficiency and effect of the flue gas can be further improved, achieving near-zero emissions. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the adsorbent regeneration tower according to an embodiment of the present invention.

[0035] Figure 2 This is a schematic diagram of the arrangement of the baffle assembly in the heating section of an embodiment of the present invention.

[0036] Figure 3 This is a schematic diagram of the structure of an adsorbent regeneration tower according to another embodiment of the present invention.

[0037] Figure 4 This is a schematic diagram of the structure of a heating section with an inclined bottom surface in an embodiment of the present invention.

[0038] Figure 5 This is a schematic diagram of the adsorbent unit in an embodiment of the present invention.

[0039] Figure label:

[0040] Tower body 1, feeding section 11, preheating section 12, 121 is the preheating inlet, 122 is the preheating outlet, heating section 13, heating inlet 131, heating outlet 132, ash discharge section 133, bottom surface 134, cooling section 14, cooling inlet 141, cooling outlet 142;

[0041] Material feeding assembly 2, material feeding pipe 21;

[0042] Baffle assembly 3, baffle plate 31;

[0043] Adsorbent 41, breathable outer shell 42. Detailed Implementation

[0044] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0045] See Figure 1 and Figure 2 According to an embodiment of the present invention, the adsorbent regeneration tower includes a tower body 1, a feeding assembly 2, and a baffle assembly 3. The inner cavity of the tower body 1 includes a feeding section 11 and a heating section 13 located below the feeding section 11. The adsorbent entering the tower body 1 first enters the feeding section 11. Preferably, the adsorbent inlet is located at the top of the tower body 1, and the feeding section 11 is located at the very top of the inner cavity of the tower body 1. A heating medium is introduced into the heating section 13, and the heating section 13 heats the adsorbent falling from the feeding section 11 through the heating medium to desorb and regenerate the adsorbent, facilitating the reuse of the adsorbent.

[0046] The material discharge assembly 2 is located within the heating section 13 and includes multiple material discharge pipes 21. The adsorbent entering the heating section 13 from the fabric section 11 is heated and then falls through the material discharge pipes 21. Preferably, the material discharge pipes 21 are arranged vertically to facilitate the fall of the adsorbent.

[0047] The baffle assembly 3 is located within the heating section 13 and includes multiple baffle plates 31. The baffle plates 31 are inclined relative to the axial direction of the discharge pipe 21. The multiple baffle plates 31 are spaced apart from each other within the heating section 13 to guide the heating medium to flow within the heating section 13, thereby heating the adsorbent in the discharge pipe 21 within the heating section 13 to desorb and regenerate the adsorbent. The heating medium can be a liquid medium or a gaseous medium. The gaseous medium can be high-temperature steam, hot air, unpurified high-temperature flue gas, gas generated by a biomass burner, or other high-temperature gases, depending on the heat source.

[0048] Under the guidance of the inclined baffles 31, the heating medium in the heating section 13 flows obliquely towards the feed pipe 21 and the inner wall of the heating section 13, resulting in a certain inclination between the flow direction of the heating medium and the inner wall of the tower body 1. This reduces the direct impact on the inner wall of the tower body 1, allowing more heating medium to achieve a smooth change of direction under the action of the baffles 31. This guides the heating medium to disperse within the chamber of the heating section 13, reducing reliance on impacting the inner wall of the tower body 1 to complete the change of direction, reducing the flow resistance of the heating medium, extending the flow time and smoothness of the heating medium, and reducing the power consumption of the heating medium. In addition, the inclined baffles arranged at intervals can avoid the back-and-forth flow collision and sharp turning of the heating medium, reducing the dead zone area of ​​the flow, making the flow of the heating medium more uniform, and the adsorbent in each feed pipe is heated more uniformly and consistently, resulting in high overall heat transfer efficiency and thus improving the quality of adsorbent desorption and regeneration.

[0049] The adsorbent in the feed pipe 21 within the heating section 13 is desorbed and regenerated through heat exchange with the heating medium. The inclined baffle 31 guides the flow, making it easier for the heating medium to diffuse further under the guidance of the baffle 31 during smooth flow. This reduces abrupt changes in direction or mutual impact between heating media, reduces the dead zone area, and balances the heating of the adsorbent in each feed pipe 21 within the heating section 13. It also prevents insufficient heating of the adsorbent in some feed pipes 21 from affecting the desorption and regeneration effect and quality of the adsorbent.

[0050] Therefore, the adsorbent regeneration tower of this embodiment of the invention can make the heating medium flow obliquely towards the inner wall of the feed pipe 21 and the heating section 13, making the flow of the heating medium smoother, reducing the flow resistance of the heating medium, and also making the heating medium more evenly dispersed in the chamber, reducing the area of ​​the heating medium turning sharply, avoiding the heating medium going back and forth and deflecting, reducing the dead zone area of ​​the flow, increasing the effective heat exchange area, and improving the regeneration effect.

[0051] In some embodiments, the tower body 1 is provided with a heating inlet 131 and a heating outlet 132. The heating inlet 131 and the heating outlet 132 are respectively connected to the heating section 13. The heating medium enters the heating section 13 through the heating inlet 131, flows in the heating section 13 under the guidance of the baffle 31, and is discharged through the heating outlet 132.

[0052] In some embodiments, the angle between the baffle plate 31 and the axial direction of the discharge pipe can be 10°-80°. The tilt angle of the baffle plate 31 can be adjusted according to parameters such as the flow direction of the heating medium, the uniformity of its distribution, and the kinetic energy intensity of the heating medium at different locations.

[0053] In some embodiments, the inner cavity of the tower body 1 further includes a cooling section 14, which is located at the bottom of the inner cavity of the tower body 1. The material feeding assembly 2 and the baffle assembly 3 are also disposed in the cooling section 14. The adsorbent after desorption and regeneration in the heating section 13 enters the cooling section 14 and falls through the material feeding pipe 21 in the cooling section 14. The baffle 31 in the cooling section 14 is used to guide the cooling medium to flow in the cooling section 14 to cool the adsorbent in the material feeding pipe 21 in the cooling section 14.

[0054] Specifically, the tower body 1 is provided with a cooling inlet 141 and a cooling outlet 142. The cooling inlet 141 and the cooling outlet 142 are respectively connected to the cooling section 14. The cooling medium enters the chamber of the cooling section 14 through the cooling inlet 141 and is dispersed in the chamber of the cooling section 14 by the guide of the baffle 31. After the adsorbent is heated, desorbed and regenerated by the heating section 13, it enters the discharge pipe 21 in the cooling section 14. After the cooling medium exchanges heat with the adsorbent in the discharge pipe 21 in the cooling section 14, it is discharged from the cooling outlet 142. The cooled adsorbent is discharged for reuse in the adsorption tower.

[0055] Preferably, the adsorbent can be cooled to a temperature below room temperature, allowing it to be directly delivered into the adsorption tower for low-temperature adsorption of flue gas. This eliminates the need for additional cooling equipment, such as a spray cooling tower, to cool the flue gas to a low temperature, reducing the number of devices and lowering costs. Alternatively, in other embodiments of the invention, the adsorbent may not be cooled to a low temperature; it can simply be cooled to a temperature suitable for adsorption and purification. Low-temperature adsorption of flue gas within the adsorption tower is achieved by cooling the flue gas to a low temperature.

[0056] It should be noted that the arrangement of the baffles 31 in the cooling section 14 is similar to that in the heating section 13. That is, the baffles 31 in the cooling section 14 are inclined relative to the axial direction of the discharge pipe 21, and multiple baffles 31 are arranged at intervals in the cooling section 14 to guide the cooling medium. The effect achieved by the baffles 31 arranged in the cooling section 14 is the same as that achieved by the baffles 31 arranged in the heating section 13, so it will not be described again here.

[0057] In some embodiments, the inner cavity of the tower body 1 further includes a preheating section 12, which is located between the material distribution section 11 and the heating section 13. The material discharge assembly 2 and the baffle assembly 3 are also located in the preheating section 12. The adsorbent entering the preheating section 12 from the material distribution section 11 enters the preheating section 12 and falls into the heating section 13 through the material discharge pipe 21 in the preheating section 12. The baffle 31 in the preheating section 12 is used to guide the preheating medium to flow in the preheating section 12 in order to preheat the adsorbent in the material discharge pipe 21 in the preheating section 12.

[0058] It should be noted that the adsorbent needs to reach a sufficiently high temperature for desorption and regeneration in the heating section 13. If the temperature of the adsorbent is too low when it enters the heating section 13, the temperature range required for the heating section 13 to raise the temperature of the adsorbent will be large. In this embodiment of the invention, the baffle assembly 3 of the heating section 13 can improve the heat exchange effect between the heating medium and the adsorbent in the heating section 13 to solve the above problem to a certain extent. In order to further optimize the regeneration tower and make the temperature of the adsorbent more controllable in the entire regeneration process, a preheating section 12 is set up to preheat the adsorbent entering the heating section 13.

[0059] Specifically, the tower body is provided with a preheating inlet 121 and a preheating outlet 122, which are respectively connected to the preheating section 12. The preheating medium enters the chamber of the preheating section 12 through the preheating inlet 121. The preheating section 12 is used to preheat the adsorbent entering the heating section 13. After exchanging heat with the adsorbent in the feed pipe 21 in the preheating section 12, the preheating medium is discharged from the preheating outlet 122. The preheating section can make the adsorbent entering the heating section 13 have a certain temperature, reduce the temperature rise of the adsorbent in the heating section 13 to balance the temperature difference in different areas of the entire heating section, alleviate the heat load of the heating section 13, and make the overall temperature in the heating section stable within the temperature range that meets the adsorbent regeneration requirements.

[0060] Considering the preheating section and the heating section as a whole for heating the adsorbent, and with the addition of the baffle assembly 3, compared to the related technology where the adsorbent is only heated in the heating section, the embodiment of the present invention can improve the overall calorific value utilization rate of the preheating medium and the heating medium by more than 20%.

[0061] The arrangement of the baffles 31 in the preheating section 12 is similar to that in the heating section 13 and the cooling section 14. That is, the baffles 31 in the preheating section 12 are inclined relative to the axial direction of the discharge pipe 21. Multiple baffles 31 are arranged at intervals in the preheating section 12 to guide the preheating medium. The effect achieved by the baffles 31 arranged in the preheating section 12 is the same as that achieved by the baffles 31 arranged in the heating section 13 and the cooling section 14, so it will not be described again here.

[0062] In some embodiments, the multiple baffles 31 of the baffle assembly 3 are divided into multiple groups of baffle units, which are arranged at intervals along a first direction. In each group of baffle units, the multiple baffles 31 are arranged at intervals along a second direction orthogonal to the first direction to guide the corresponding medium between two adjacent baffles 31 to flow along the inclined direction of the baffles 31.

[0063] In other words, under normal circumstances, the first direction is the main flow direction of the heat exchange medium in the corresponding preheating section 12, heating section 13, or cooling section 14. During the flow of the heat exchange medium along the first direction, it is guided by multiple sets of baffle units arranged at intervals to achieve uniform flow of the heat exchange medium passing through the corresponding baffle units. Through the guidance of the heat exchange medium by multiple sets of baffle units, the adsorbent in the corresponding feed pipe 21 can be heated more uniformly, and the desorption and regeneration effect can be more uniform.

[0064] like Figure 2 As shown, in an optional embodiment, the first direction is the axial direction of the discharge pipe 21, and multiple baffles 31 in each baffle unit are equally spaced and arranged in parallel.

[0065] It should be noted that parallelism in the embodiments of the present invention includes parallelism. For example, when the baffle plate 31 is a flat plate, the parallel arrangement of multiple baffle plates 31 is the same as the parallel arrangement. When the baffle plate 31 is a V-shaped plate, the parallel arrangement of multiple baffle plates 31 means that the corresponding parts of the multiple baffle plates 31 are parallel.

[0066] In other words, the arrangement of the multiple baffles 31 in the baffle unit is such that the multiple baffles 31 in the same baffle unit are parallel to each other, and the distance between two adjacent baffles 31 in the same baffle unit is also the same. That is, the multiple baffles 31 in the same baffle unit are equally spaced and arranged in parallel.

[0067] like Figure 1 and Figure 2 As shown in the figure, the X direction is the first direction and the Y direction is the second direction. The baffle 31 is a flat plate structure with a length extension direction. Taking the heating section 13 as an example, the heating inlet 131 of the heating section 13 is set on the lower side wall of the heating section 13, and the heating outlet 132 of the heating section 13 is set on the upper side wall of the heating section 13. When the baffle assembly 3 is arranged, the axial direction of the discharge pipe 21 is taken as the first direction, and the axial direction of the discharge pipe 21 is taken as the arrangement direction of the baffle unit. The baffles 31 in the same baffle unit are arranged in parallel, and the spacing between two adjacent baffles 31 in the same baffle unit is the same, so that the heating medium in the plane orthogonal to the axial direction of the discharge pipe 21 in the heating section 13 can be balanced, so that the adsorbent in the discharge pipe 21 in the heating section 13 is heated more evenly.

[0068] Optionally, the spacing between adjacent baffles 31 in different baffle units can be adjusted according to the actual application. For example, taking heating section 13 as an example, the tilt angle of the baffles and the spacing between adjacent baffles 31 in the baffle units near the heating inlet 131 and the heating outlet 132 in heating section 13 are different from those in the baffle units located in the middle of heating section 13. This is to more effectively adjust the medium flow direction near the heating inlet and the heating outlet 132 and reduce the influence of the medium flow direction near the heating inlet 131 and the heating outlet 132 in heating section 13 on the medium flow direction in the middle of heating section 13.

[0069] In an optional embodiment, among the multiple baffles 31 in each set of baffle units, at least some of the baffles 31 have an inclination direction different from that of the other baffles 31.

[0070] In other words, multiple baffles within the same baffle unit can have different inclination directions. Adjacent baffles with different inclination directions form a guiding space with varying opening angles, allowing the heat transfer medium to be redistributed within the baffle unit's area, thus improving the uniformity of the heat transfer medium.

[0071] Optionally, the arrangement of multiple baffles 31 in the baffle unit can be such that multiple baffles 31 located in the same baffle unit are partially arranged in parallel, and multiple baffles 31 are arranged sequentially in a W-shape in the second direction. That is, baffles 31 located at odd-numbered positions in the same baffle unit can be arranged in parallel with each other, and baffles 31 located at even-numbered positions can be arranged in parallel with each other.

[0072] In an optional embodiment, the multiple baffles 31 in each set of baffle units have the same tilt direction, and in the multiple sets of baffle units, the tilt direction of the baffles 31 in at least some of the baffle units is different from the tilt direction of the baffles 31 in other baffle units.

[0073] Optionally, one feasible arrangement of multiple baffles 31 in a baffle unit is that multiple baffles 31 located in the same baffle unit are arranged in parallel, with the same spacing between any two adjacent baffles 31 in the same baffle unit. The inclination directions of the baffles 31 in two adjacent sets of baffle units are different to adjust the flow trajectory of the heat exchange medium. The different inclination directions of the baffles in different baffle units result in the heat exchange medium having opposite flow directions after passing through different baffle units. Since there is a buffer space between two adjacent baffle units, baffle collision and flow dead zones will not occur.

[0074] In some embodiments, the multiple baffles 31 in the baffle assembly 3 are divided into multiple baffle units. The multiple baffle units are arranged at intervals along the axial direction of the discharge pipe 21. The baffles 31 in the baffle unit are arranged at intervals and in parallel along a direction orthogonal to the axial direction of the discharge pipe 21 to guide the corresponding medium between two adjacent baffles 31 to flow along the inclined direction of the baffles 31. The arrangement directions of the baffles 31 in at least two baffle units are set at an angle.

[0075] In other words, multiple sets of baffle plate units are arranged along the axial direction of the feed pipe 21. Multiple baffle plates 31 in each set of baffle plate units are arranged in a direction orthogonal to the axial direction of the feed pipe 21. The inclination angle and direction of the multiple baffle plates 31 in each set of baffle plate units are the same. At least two sets of baffle plate units have baffle plates 31 arranged at a certain angle to guide the corresponding medium between two adjacent baffle plates 31 to flow along the inclination direction of the baffle plates 31, so that the flow direction of the heat exchange medium changes when it passes through different baffle plate units.

[0076] Taking a strip-shaped flat plate with a length extension direction as a baffle plate 31 as an example, the parallel arrangement of multiple baffle plates 31 in the baffle plate unit is orthogonal to the axial direction of the feed pipe 21 and the length extension direction of the baffle plate 31, so as to ensure that the heat exchange medium between two adjacent baffle plates 31 can flow along the inclined direction of the baffle plate 31.

[0077] Optionally, in the multiple baffle units, the baffles 31 in some baffle units are arranged at intervals along direction A, which is orthogonal to the axial direction of the discharge pipe 21. However, the baffles 31 in the remaining baffle units are arranged at intervals along direction B in a plane orthogonal to the axial direction of the discharge pipe 21. The angle between direction A and direction B can be 10°-80°. For example, the angle between direction A and direction B can be 10°, 25°, 30°, 57° or 80°.

[0078] For example, taking heating section 13 as an example, four sets of baffle plate units are arranged in heating section 13. Along the axial direction of the feed pipe 21, they are the first baffle plate unit, the second baffle plate unit, the third baffle plate unit and the fourth baffle plate unit. The baffle plates 31 in the first baffle plate unit, the second baffle plate unit and the third baffle plate unit are arranged in the same direction. The baffle plates 31 in the fourth baffle plate unit are arranged at an angle of 30°, 45° or 50° to the baffle plates 31 in the third baffle plate unit.

[0079] Furthermore, in some optional embodiments, there are at least three sets of baffle units, and the baffles 31 in the at least three sets of baffle units are arranged at an angle to guide the corresponding medium to flow spirally along the axial direction of the discharge pipe 21.

[0080] It should be noted that multiple baffles 31 are used as a baffle unit, and at least three sets of baffle units are arranged at intervals along the axial direction of the feed pipe 21. The baffles 31 in the baffle unit are arranged at intervals and in parallel in a direction orthogonal to the axial direction of the feed pipe 21 to guide the corresponding medium between two adjacent baffles 31 to flow along the inclined direction of the baffles 31. By changing the arrangement direction of the baffles 31, multiple sets of baffle units can guide the heat exchange medium to flow in a spiral form along the axial direction of the feed pipe 21, which can extend the travel distance of the heat exchange medium. The inclined arrangement of the baffles 31 makes the medium flow smooth and reduces the dead zone area.

[0081] To achieve spiral flow guidance of the heat exchange medium by multiple sets of baffle units, the arrangement direction of the baffles 31 in the next baffle unit is obtained by rotating the arrangement direction of the baffles 31 in the previous baffle unit around the axial direction of the discharge pipe 21. That is, taking the arrangement direction of the baffles 31 in one baffle unit as a reference, the arrangement direction of the baffles 31 in the reference baffle unit is rotated clockwise or counterclockwise by a certain angle around the axial direction of the discharge pipe 21 to form the next baffle unit, and so on, so that the arrangement directions of the baffles 31 in at least three sets of baffle units are set at an angle to guide the corresponding medium to spiral flow along the axial direction of the discharge pipe 21. The angle between the arrangement directions of the baffles 31 in two adjacent baffle units can be selected in the range of 10°-80°, for example, 10°, 25°, 30°, 57° or 80°.

[0082] Taking heating section 13 as an example, three sets of baffle plate units are arranged in heating section 13. Along the axial direction of the discharge pipe 21, they are the first baffle plate unit, the second baffle plate unit, and the third baffle plate unit. The second baffle plate unit is obtained by rotating the arrangement direction of the baffle plate 31 in the first baffle plate unit clockwise by 40° around the axial direction of the discharge pipe 21. The third baffle plate unit is obtained by rotating the arrangement direction of the baffle plate 31 in the second baffle plate unit clockwise by 40° or 50° around the axial direction of the discharge pipe 21.

[0083] In some embodiments, the baffle plate 31 is connected to the discharge pipe 21, and a gap is provided between the baffle plate 31 and the wall of the inner cavity.

[0084] In other words, there are no dead zones between the baffle plate 31 and the inner wall of the tower cavity that would prevent the heat exchange medium from flowing, which makes it easier for the heat exchange medium to flow smoothly and reduces the flow dead zone. The feed pipe 21 can be supported by the baffle plate 31, which also has the function of heat dissipation fins, which can improve the heat exchange effect.

[0085] Optionally, depending on the distribution of the baffles 31, through holes corresponding to the discharge pipe 21 are opened on the baffles 31 so that the discharge pipe 21 can pass through the baffles 31 during assembly. The baffles 31 can be connected to the discharge pipe 21 by a connector or by welding.

[0086] In the above embodiments, the baffles 31 are arranged in a regular array, which makes it easier to install the baffles 31 and facilitates the effective guidance of the heat exchange medium and the simulation analysis of gas dynamic flow. This reduces the side resistance or vortex phenomenon caused by the heat exchange medium and also reduces the difficulty of adjusting the baffles 31.

[0087] like Figure 3 and Figure 4 As shown, in some embodiments, the bottom surface 134 of the heating section 13 is an inclined surface, and an ash discharge section 133 is provided on the heating section 13. The ash discharge section 133 is located at the lower end of the bottom surface 134 of the heating section 13 to discharge the debris that settles in the heating section 13.

[0088] It should be noted that when the heating medium entering the heating inlet 131 contains impurities such as smoke and dust, for example, if the heating medium is unpurified flue gas, it will settle during the flow of the heating section 13. The smoke and dust that settles on the baffle plate 31 can slide down to the bottom of the heating section 13 by relying on the inclined baffle plate 31. The smoke and dust in the heating section 13 can be discharged from the ash discharge section 133 through the inclined bottom surface 134, so that the regeneration tower can use more heat sources to work and reduce the cost of heat sources.

[0089] When using a heating medium containing dust and other impurities, the baffle plate not only needs to guide the heating medium but also needs to guide the settling impurities to slide down. Therefore, the tilt angle of the baffle plate needs to be further optimized. The angle between the baffle plate and the axial direction of the discharge pipe can be 10°-55° to avoid the baffle plate tilt angle being too gentle.

[0090] In this embodiment of the invention, the baffle plate can balance the two effects of guiding the heating medium and guiding the sliding of dust and other debris. When the guidance of the heating medium in the heating section is affected because the baffle plate needs to meet the sliding of dust and other debris, the regeneration tower structure with a preheating section can make up for it. In this way, the regeneration tower can improve its overall performance through multi-dimensional coordination.

[0091] Optionally, the ash discharge section 133 is an ash discharge port provided on the heating section 13. The ash discharge port can be a circular opening or a long slot. A gate valve is provided on the ash discharge port. When ash cleaning is required, the gate valve is opened to clean the ash.

[0092] Optionally, the bottom surface 134 of the heating section 13 is an inclined flat plate structure or an inclined curved surface structure. When the bottom surface 134 of the heating section 13 is an inclined curved surface structure, the settling debris is gathered by the gathering effect of the curved surface of the bottom surface 134 of the heating section 13, and the gathered debris is further gathered to the area near the ash discharge section 133 by the inclination angle of the bottom surface 134 of the heating section 13, so as to facilitate discharge.

[0093] like Figure 5 As shown in the embodiments of the present invention, the adsorbent 41 can be a granular or powdered adsorbent, or an adsorbent body made of powder or granular adsorbent, such as a spherical or cylindrical body formed by binding powder or granular adsorbent with a binder. Of course, a protective shell can be further formed on the outside of the adsorbent body, such as a breathable membrane covering the outside of the adsorbent body, to improve the strength of the adsorbent body. The adsorbent 41 can be filled inside the breathable shell 42 to form an adsorbent unit. The breathable shell 42 has vent holes, through which flue gas can enter the breathable shell 42. The flue gas can pass through the gaps between adjacent adsorbents 41 and / or the pores of the adsorbent itself, thereby reducing direct collisions, friction and wear between adsorbents, and dust generation. The breathable shell can be in the shape of a sphere, cylinder, or other rotating body, wherein the diameter of the adsorption unit is 10mm-100mm, and the diameter of the adsorbent is 1mm-10mm.

[0094] The low-temperature adsorption regeneration system of this invention is described below.

[0095] The low-temperature adsorption regeneration system of this invention includes an adsorption tower, a regeneration tower, and a cooling tower. The adsorption tower has a flue gas inlet and a flue gas outlet. Flue gas enters the adsorption tower from the flue gas inlet and comes into contact with the adsorbent inside the adsorption tower for adsorption. The flue gas purified by adsorption is discharged from the flue gas outlet. The regeneration tower is an adsorbent regeneration tower as described in the above embodiment. The regeneration tower is connected to the adsorption tower and is used to regenerate the adsorbent that has been saturated by adsorption discharged from the adsorption tower and to send the regenerated adsorbent back into the adsorption tower. The cooling tower is connected to the adsorption tower and is used to cool the flue gas to below room temperature before conveying it to the flue gas inlet of the adsorption tower.

[0096] The low-temperature adsorption regeneration system of this invention can reduce the flow resistance of the heating medium, decrease the dead zone area, and improve the regeneration effect of the adsorbent. Furthermore, this system can also cool the high-temperature flue gas to below room temperature, allowing the adsorbent in the adsorption tower to contact the flue gas in a sub-room environment. Compared to the activity of the adsorbent at high temperatures, the activity of the adsorbent below room temperature can be increased by tens or even hundreds of times. Therefore, the purification efficiency and effect of the flue gas can be further improved, achieving near-zero emissions.

[0097] In this embodiment of the invention, the low temperature refers to below room temperature, preferably below zero degrees Celsius, and more preferably -20°C to -10°C. The inventors have discovered that lower flue gas temperatures are more beneficial for adsorption and purification. However, excessively low flue gas temperatures lead to complex equipment structures for cooling the flue gas, increased energy consumption, and for example, the cooling equipment, adsorption tower, and pipelines require insulation layers and high sealing performance, thus increasing costs. Furthermore, excessively low temperatures cause condensation to easily form inside the adsorption tower, leading to adsorbent adhesion and blockage, which affects adsorption. Therefore, cooling the flue gas to -20°C to -10°C is advantageous.

[0098] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0099] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0100] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0101] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0102] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0103] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. An adsorbent regeneration tower, characterized in that, include: The tower body has an inner cavity comprising a cloth section and a heating section located below the cloth section. The cloth section is located at the top of the inner cavity of the tower body, and the heating section is used to heat the adsorbent to desorb and regenerate the adsorbent. A material discharge assembly, comprising multiple material discharge pipes, is disposed within the heating section, through which the adsorbent entering the heating section from the fabric section falls. A flow-blocking assembly is provided within the heating section and includes multiple flow-blocking plates. The flow-blocking plates are inclined relative to the axial direction of the discharge pipe. The multiple flow-blocking plates are spaced apart from each other within the heating section to guide the heating medium to flow within the heating section to heat the adsorbent in the discharge pipe within the heating section, thereby causing the adsorbent to desorb and regenerate. The baffle assembly consists of multiple baffle plates divided into multiple baffle plate units. These multiple baffle plate units are arranged at intervals along the axial direction of the discharge pipe. The baffle plates in each baffle plate unit are arranged in parallel and at intervals along a direction orthogonal to the axial direction of the discharge pipe to guide the corresponding medium between adjacent baffle plates to flow along the inclined direction of the baffle plates. There are at least three baffle plate units, and the baffle plates in the at least three baffle plate units are arranged at an angle to guide the corresponding medium to flow spirally along the axial direction of the discharge pipe. The bottom surface of the heating section is inclined, and an ash discharge section is provided on the heating section. The ash discharge section is located at the lower end of the bottom surface of the heating section to discharge the debris that settles in the heating section.

2. The adsorbent regeneration tower according to claim 1, characterized in that, The inner cavity of the tower body also includes a cooling section, which is located at the bottom of the inner cavity of the tower body. The material feeding assembly and the baffle assembly are also provided in the cooling section. The adsorbent after desorption and regeneration in the heating section enters the cooling section and falls through the material feeding pipe in the cooling section. The baffle plate in the cooling section is used to guide the cooling medium to flow in the cooling section to cool the adsorbent in the material feeding pipe in the cooling section.

3. The adsorbent regeneration tower according to claim 2, characterized in that, The inner cavity of the tower body also includes a preheating section, which is located between the material distribution section and the heating section. The material feeding assembly and the baffle assembly are also located in the preheating section. The adsorbent entering the preheating section from the material distribution section enters the preheating section and falls into the heating section through the material feeding pipe in the preheating section. The baffle plate in the preheating section is used to guide the flow of the preheating medium in the preheating section to preheat the adsorbent in the material feeding pipe in the preheating section.

4. The adsorbent regeneration tower according to any one of claims 1-3, characterized in that, The multiple baffles of the baffle assembly are divided into multiple groups of baffle units. The multiple groups of baffle units are arranged at intervals along a first direction. The multiple baffles in each group of baffle units are arranged at intervals along a second direction orthogonal to the first direction to guide the corresponding medium between two adjacent baffles to flow along the inclined direction of the baffle.

5. The adsorbent regeneration tower according to claim 4, characterized in that, The first direction is the axial direction of the discharge pipe, and the multiple baffles in each baffle unit are equally spaced and arranged in parallel.

6. The adsorbent regeneration tower according to claim 4, characterized in that, In each set of baffle units, at least some of the baffles have an inclination direction different from that of the other baffles. Alternatively, multiple baffles in each set of baffle units may have the same tilt direction, and in multiple sets of baffle units, at least some baffles in the baffle units may have a different tilt direction than the baffles in other baffle units.

7. A low-temperature adsorption-regeneration system, characterized in that, include: An adsorption tower has a flue gas inlet and a flue gas outlet. Low-temperature flue gas below room temperature enters the adsorption tower from the flue gas inlet to be adsorbed and purified by the adsorbent in the adsorption tower. The flue gas purified by adsorption is discharged from the flue gas outlet. A regeneration tower, wherein the regeneration tower is an adsorbent regeneration tower as described in any one of claims 1-6, the regeneration tower being connected to the adsorption tower and used to regenerate the adsorbent that has been saturated with adsorption discharged from the adsorption tower and to send the regenerated adsorbent back into the adsorption tower. and A cooling tower, connected to the adsorption tower, is used to cool the flue gas to a low temperature below room temperature and deliver it to the flue gas inlet of the adsorption tower.

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