Adsorbent regeneration tower and low-temperature adsorption regeneration system

Abstract

The present disclosure discloses an adsorbent regeneration tower and a low-temperature adsorption regeneration system. The adsorbent regeneration tower comprises a tower body, a material-dropping assembly, and a baffle assembly. An inner chamber of the tower body comprises a material distribution section and a heating section located below the material distribution section, the material distribution section is located at the topmost part of the inner chamber of the tower body, and the heating section is used to heat an adsorbent to desorb and regenerate the adsorbent. The material-dropping assembly comprises a plurality of material-dropping tubes and is disposed within the heating section, and the adsorbent entering the heating section from the material distribution section falls through the material-dropping tubes. The baffle assembly is disposed within the heating section and comprises a plurality of baffle plates. The baffle plates are inclined relative to the axial direction of the material-dropping tubes. The plurality of baffle plates are spaced apart from one another within the heating section, and are used to guide the flow of a heating medium within the heating section, so as to heat the adsorbent inside the material-dropping tubes within the heating section and achieve desorption and regeneration of the adsorbent. The adsorbent regeneration tower disclosed in the present disclosure can reduce the flow resistance of the heat exchange medium and reduce the area of flow dead zones.

Description

Adsorbent regeneration tower and low-temperature adsorption regeneration system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure is based on and claims the priority of Chinese patent application with application number 202410051943.0 and application date of January 12, 2024. The entire content of the Chinese patent application is hereby incorporated into this application by reference. Technical Field

[0003] The present disclosure belongs to the technical field of flue gas purification, and particularly relates to an adsorbent regeneration tower and a low-temperature adsorption regeneration system. Background Art

[0004] Carbon-based adsorption technology for flue gas pollutant removal enables integrated desulfurization and denitrification, while also efficiently removing unconventional pollutants such as SO3, heavy metals, and VOCs. The regeneration tower is a key component of carbon-based adsorption systems for flue gas pollutant removal. It is used to regenerate deactivated adsorbents after pollutant adsorption for reactivity and recycling.

[0005] In the related art, a vertical shell and tube thermal regeneration tower is used to regenerate deactivated adsorbent. The adsorbent flows through the tube side and the heat exchange medium flows through the shell side. A baffle is set on the shell side to change the flow path of the heat exchange medium, thereby improving the heat exchange effect. However, the baffle will cause the heat exchange medium to have a lateral frontal impact on the inner wall of the regeneration tower and the material pipe, resulting in a large flow resistance of the heat exchange medium, resulting in high power consumption of the heat exchange medium transportation. The heat exchange medium also has a round-trip deflection, and there is a large flow dead zone near the deflection point, forming a large ineffective heat exchange area, and the adsorbent is poorly heated. Summary of the Invention

[0006] The present disclosure aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the present disclosure proposes an adsorbent regeneration tower that can reduce the flow resistance of the heating medium, reduce the flow dead zone area, and improve the regeneration effect.

[0007] The present disclosure also provides a low-temperature adsorption regeneration system.

[0008] The adsorbent regeneration tower of the present disclosure comprises:

[0009] a tower body, wherein the inner cavity of the tower body comprises a distribution section and a heating section located below the distribution section, the distribution section being located at the top of the inner cavity of the tower body, and the heating section being used to heat the adsorbent to desorb and regenerate the adsorbent;

[0010] A blanking assembly, comprising a plurality of blanking pipes, the blanking assembly being arranged in the heating section, and the adsorbent entering the heating section from the material distribution section falls through the blanking pipes;

[0011] A deflector assembly is arranged in the heating section and includes a plurality of deflector plates, which are arranged at an angle relative to the axial direction of the drop tube. The plurality of deflector plates are arranged in the heating section at intervals from each other, and are used to guide the heating medium to flow in the heating section to heat the adsorbent in the drop tube in the heating section to desorb and regenerate the adsorbent.

[0012] The adsorbent regeneration tower disclosed in the present invention can make the heating medium rush obliquely toward the drop pipe and the inner wall of the tower body through the inclined baffles arranged at intervals, thereby reducing the flow resistance of the heating medium, extending the flow time and flow smoothness of the heating medium, and reducing the power consumption of the heating medium transportation. In addition, the inclined baffles arranged at intervals can avoid the back-and-forth baffle collision and sharp turning of the heating medium, reduce the flow dead zone area, make the heating medium flow more uniform, and the adsorbent in each drop pipe is heated more uniformly and consistently, and the overall heat transfer efficiency is high, thereby improving the quality of adsorbent desorption and regeneration.

[0013] Optionally, 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 blanking assembly and the deflection assembly are also arranged in the cooling section. The adsorbent after desorption and regeneration in the heating section enters the cooling section and falls through the blanking pipe in the cooling section. The deflector in the cooling section is used to guide the cooling medium to flow in the cooling section to cool the adsorbent in the blanking pipe in the cooling section.

[0014] In the present disclosure, the tower body is provided with a cooling section, which enables the regenerated adsorbent to exchange heat with the cooling medium in the cooling section to reduce the temperature of the adsorbent, so that it can be transported to the adsorbent for adsorption and purification of the flue gas. Optionally, the adsorbent can be cooled to a low temperature below room temperature, so that the low-temperature adsorbent can be directly transported to the adsorption tower for low-temperature adsorption of the flue gas, without the need for additional cooling equipment for cooling the flue gas to a low temperature, such as a spray cooling tower, thereby reducing the number of equipment and reducing costs. Of course, in the present disclosure, the adsorbent can also be cooled to a temperature suitable for adsorption purification instead of being cooled to a low temperature. The low-temperature adsorption of flue gas in the adsorption tower is performed by cooling the flue gas to a low temperature.

[0015] Optionally, the inner cavity of the tower body also includes a preheating section, which is arranged between the distribution section and the heating section, and the blanking assembly and the deflection assembly are also arranged in the preheating section. The adsorbent entering the preheating section from the distribution section enters the preheating section and falls into the heating section through the blanking pipe in the preheating section. The deflector in the preheating section is used to guide the preheating medium to flow in the preheating section to preheat the adsorbent in the blanking pipe in the preheating section.

[0016] In the present disclosure, the tower body is provided with a preheating section, which can heat up the adsorbent before entering the heating section, reduce the temperature increase of the adsorbent in the heating section to balance the temperature difference between different areas in the entire heating section, so that the overall temperature in the heating section can be stably maintained within the temperature range that meets the adsorbent regeneration range. The preheating section and the heating section are regarded as a whole for heating the adsorbent. Compared with the related art of only setting up a heating section to heat the adsorbent, the present disclosure can improve the overall calorific value utilization rate of the preheating medium and the heating medium by more than 10%. The effects achieved by the deflection assembly and the blanking assembly in the preheating section and the heating section are the same and will not be repeated here.

[0017] 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, and 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.

[0018] In the present disclosure, by grouping the baffles, the baffles can be arranged according to multiple factors such as the position of the multiple groups of baffle units in the tower body, the uniformity of the heat exchange medium, and the factors that interfere with the flow of the heat exchange medium, so as to adjust the spacing distance between the baffles located in the same group of baffle units and the inclination angle of each baffle.

[0019] Optionally, the first direction is the axial direction of the blanking tube, and the multiple baffles in each group of baffle units are equally spaced and arranged in parallel.

[0020] In the present disclosure, multiple groups of baffle units are arranged at intervals along the axial direction of the drop tube, and the heat exchange medium undergoes multiple stages of direction change and uniform flow within the intervals divided by the multiple groups of baffle units, so that the adsorbent passes through multiple intervals in the drop tube in sequence to complete uniform heat exchange, and at the same time it is more convenient to arrange the baffles.

[0021] Optionally, among the multiple baffles in each group of baffle units, the inclination direction of at least some of the baffles is different from the inclination direction of other baffles;

[0022] Alternatively, the inclination directions of the multiple baffles in each group of baffle units are the same, and in the multiple groups of baffle units, the inclination directions of the baffles in at least some of the baffle units are different from the inclination directions of the baffles in other baffle units.

[0023] In the present disclosure, the inclination directions of multiple baffles located in the same baffle unit can be different, and a guide space with a changing opening and closing degree is formed between two adjacent baffles with different inclination directions. The heat exchange medium can be redistributed in the interval where the baffle units are located, thereby improving the balance of the heat exchange medium; through the different inclination directions of the baffles in different baffle units, the heat exchange medium has opposite guide directions after passing through different baffle units. Since the heat exchange medium has a buffer space between two adjacent baffle units, it will not cause baffle counterflow and flow dead zones.

[0024] Optionally, the multiple baffles in the baffle assembly are divided into multiple groups of baffle units, and the multiple groups of baffle units are arranged at intervals along the axial direction of the blanking tube, and the baffles in the baffle units are spaced and arranged in parallel along a direction orthogonal to the axial direction of the blanking tube to guide the corresponding medium between two adjacent baffles to flow along the inclined direction of the baffles;

[0025] The baffles in at least two groups of baffle units are arranged at an angle.

[0026] In the present disclosure, the baffles in at least two groups of baffle units are arranged at a certain angle to guide the corresponding media between the two adjacent baffles to flow along the inclined direction of the baffles, so that the flow direction of the heat exchange medium changes when passing through different baffle units, which can avoid the adsorbent in the same drop pipe always exchanging heat with the same part of the heat exchange medium, thereby improving the fluidity of the heat exchange medium.

[0027] Optionally, the baffle units are in at least three groups, and the baffles in the at least three groups of baffle units are arranged at an angle to guide the corresponding medium to flow in an axial spiral along the blanking pipe.

[0028] In the present disclosure, by arranging the baffles in at least three groups of baffle units at an angle, the distance traveled by the heat exchange medium can be extended, the fluidity of the heat exchange medium can be improved, and the medium flow can be smoothed by means of the inclined baffles.

[0029] Optionally, the bottom surface of the heating section is an inclined surface, and an ash discharge portion is provided on the heating section. The ash discharge portion is provided at a low end of the bottom surface of the heating section to discharge debris settled in the heating section.

[0030] In the present disclosure, the inclined bottom surface can cooperate with the inclined deflector to allow smoke and dust and other debris in the heating medium to slide down and gather. The heating medium can contain impurities, reducing the cleanliness requirements of the heating medium and expanding the optional range of heating media.

[0031] The low-temperature adsorption regeneration system disclosed herein comprises:

[0032] an adsorption tower, the adsorption tower having a flue gas inlet and a flue gas outlet, wherein 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, and the adsorbed and purified flue gas is discharged from the flue gas outlet;

[0033] a regeneration tower, wherein the regeneration tower is the adsorbent regeneration tower as described above, the regeneration tower is connected to the adsorption tower, and is used to regenerate the adsorbent saturated with adsorption discharged from the adsorption tower and return the regenerated adsorbent to the adsorption tower; and

[0034] A cooling tower is connected to the adsorption tower and is used to cool the flue gas into low-temperature flue gas below room temperature and transport it to the flue gas inlet of the adsorption tower.

[0035] The low-temperature adsorption regeneration system disclosed herein can reduce the flow resistance of the heating medium, minimize the area of ​​dead zones, and improve the regeneration effect of the adsorbent. Furthermore, the low-temperature adsorption regeneration system disclosed herein can also cool high-temperature flue gas to below room temperature, allowing the adsorbent in the adsorption tower to contact the flue gas in an environment below room temperature, achieving low-temperature adsorption of the flue gas. Compared to the activity of the adsorbent in a high-temperature environment, the activity of the adsorbent under low-temperature adsorption conditions below room temperature can be increased by tens or even hundreds of times, thereby further improving the flue gas purification efficiency and effectiveness, achieving near-zero emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG1 is a schematic structural diagram of an adsorbent regeneration tower according to an embodiment of the present disclosure.

[0037] FIG2 is a schematic diagram of the arrangement of the deflection assembly in the heating section in an embodiment of the present disclosure.

[0038] FIG3 is a schematic structural diagram of an adsorbent regeneration tower according to another embodiment of the present disclosure.

[0039] FIG4 is a schematic structural diagram of a heating section having an inclined bottom surface in an embodiment of the present disclosure.

[0040] FIG5 is a schematic structural diagram of an adsorbent unit in an embodiment of the present disclosure.

[0041] Figure numerals: tower body 1, distribution 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 part 133, bottom surface 134, cooling section 14, cooling inlet 141, cooling outlet 142; blanking assembly 2, blanking pipe 21; deflector assembly 3, deflector 31; adsorbent 41, breathable shell 42. DETAILED DESCRIPTION

[0042] The embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present disclosure, but should not be understood as limiting the present disclosure.

[0043] 1 and 2 , an adsorbent regeneration tower according to an embodiment of the present disclosure includes a tower body 1, a material drop assembly 2, and a deflection assembly 3. The inner cavity of the tower body 1 includes a distribution section 11 and a heating section 13 located below the distribution section 11. Adsorbent entering the tower body 1 first enters the distribution section 11. Optionally, the adsorbent inlet is provided at the top of the tower body 1, and the distribution 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 12, which heats the adsorbent dropped from the distribution section 11 with the heating medium to desorb and regenerate the adsorbent, thereby facilitating its reuse.

[0044] The drop assembly 2 is provided in the heating section 13 and includes a plurality of drop pipes 21. The adsorbent entering the heating section 13 from the material distribution section 11 is heated and then drops through the drop pipes 21. Optionally, the drop pipes 21 are arranged in a vertical direction to facilitate the drop of the adsorbent.

[0045] The deflection assembly 3 is arranged in the heating section 13 and includes a plurality of deflection plates 31. The deflection plates 31 are arranged at an axial angle relative to the blanking tube 21. The plurality of deflection plates 31 are arranged in the heating section 13 at intervals from each other, and are used to guide the heating medium to flow in the heating section 13 to heat the adsorbent in the blanking tube 21 in the heating section 13 to desorb and regenerate the adsorbent. The heating medium can be a liquid medium or a gaseous medium, wherein 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 gas depending on the heat source.

[0046] Under the guiding action of the inclined baffle 31, the heating medium in the heating section 13 is caused to rush obliquely toward the inner wall of the drop pipe 21 and the heating section 13, so that the flow direction of the heating medium has a certain inclination with the inner wall of the tower body 1, reducing the frontal impact on the inner wall of the tower body 1, and more heating medium can achieve smooth direction change under the action of the baffle 31, guiding the heating medium to be dispersed in the chamber of the heating section 13, reducing the reliance on impacting the inner wall of the tower body 1 to complete the direction change, reducing the flow resistance of the heating medium, extending the flow time and flow smoothness of the heating medium, and reducing the power consumption of the heating medium transportation. In addition, the inclined baffles arranged at intervals from each other can avoid the round-trip baffle collision and sharp turning of the heating medium, reducing the flow dead zone area, making the heating medium flow more uniform, and the adsorbent in each drop pipe is heated more uniformly and consistently, with high overall heat transfer efficiency, thereby improving the quality of adsorbent desorption and regeneration.

[0047] The adsorbent in the drop pipe 21 in the heating section 13 is desorbed and regenerated by exchanging heat with the heating medium. The guide of the inclined baffle 31 makes it easier for the heating medium to further diffuse under the guidance of the baffle 31 in a smooth flow, reduces sharp turns or mutual impact between heating media, reduces the flow dead zone area, and balances the heating conditions of the adsorbent in each drop pipe 21 in the heating section 13, avoiding insufficient heating of the adsorbent in some drop pipes 21 affecting the desorption and regeneration effect and quality of the adsorbent.

[0048] Therefore, the adsorbent regeneration tower of the embodiment of the present disclosure can make the heating medium rush obliquely toward the inner wall of the drop pipe 21 and the heating section 13, so that the heating medium flows more smoothly, reducing the flow resistance of the heating medium. It can also make the heating medium more evenly dispersed in the chamber, reduce the area where the heating medium turns sharply, avoid the heating medium from flowing back and forth, and reduce the dead zone area of ​​the flow, thereby increasing the effective heat exchange area and improving the regeneration effect.

[0049] In some embodiments, a heating inlet 131 and a heating outlet 132 are provided on the tower body 1, and 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 deflector 31, and is discharged through the heating outlet 132.

[0050] In some embodiments, the angle between the baffle 31 and the axial direction of the blanking tube can be 10°-80°. The inclination angle of the corresponding baffle 31 can be adjusted according to parameters such as the flow direction, distribution uniformity, and kinetic energy intensity of the heating medium at different positions.

[0051] In some embodiments, the inner cavity of the tower body 1 also includes a cooling section 14, which is located at the bottom of the inner cavity of the tower body 1. The blanking assembly 2 and the deflection assembly 3 are also arranged 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 blanking pipe 21 in the cooling section 14. The deflector 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 blanking pipe 21 in the cooling section 14.

[0052] Specifically, a cooling inlet 141 and a cooling outlet 142 are provided on the tower body 1, and 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 through the drainage of the baffle 31 in the cooling section 14. After being heated, desorbed and regenerated by the heating section 13, the adsorbent enters the drop pipe 21 in the cooling section 14. The cooling medium exchanges heat with the adsorbent in the drop pipe 21 in the cooling section 14 and is discharged from the cooling outlet 142. The cooled adsorbent is discharged for reuse by the adsorption tower.

[0053] Optionally, the adsorbent can be cooled to a low temperature below room temperature, thereby allowing the low-temperature adsorbent to be directly transported to 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, for cooling the flue gas to a low temperature, thereby reducing the amount of equipment and lowering costs. Of course, in the embodiments of the present disclosure, the adsorbent can also be cooled to a temperature suitable for adsorption purification without cooling to a low temperature. Low-temperature adsorption of flue gas in the adsorption tower is performed by cooling the flue gas to a low temperature.

[0054] It should be noted that the arrangement of the baffles 31 in the cooling section 14 is similar to that of the baffles 31 in the heating section 13, that is, the baffles 31 in the cooling section 14 are arranged at an axial tilt relative to the blanking tube 21, and multiple baffles 31 are arranged in the cooling section 14 at intervals to facilitate the guidance of 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 they will not be repeated here.

[0055] In some embodiments, the inner cavity of the tower body 1 also includes a preheating section 12, which is arranged between the distribution section 11 and the heating section 13. The blanking assembly 2 and the deflection assembly 3 are also arranged in the preheating section 12. The adsorbent entering the preheating section 12 from the distribution section 11 enters the preheating section 12 and falls into the heating section 13 through the blanking pipe 21 in the preheating section 12. The deflector 31 in the preheating section 12 is used to guide the preheating medium to flow in the preheating section 12 to preheat the adsorbent in the blanking pipe 21 in the preheating section 12.

[0056] 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 entering the heating section 13, the heating section 13 will need to heat the adsorbent to a large temperature. In the embodiment of the present disclosure, the deflection component 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 to preheat and heat the adsorbent entering the heating section 13.

[0057] Specifically, a preheating inlet 121 and a preheating outlet 122 are provided on the tower body, and the preheating inlet 121 and the preheating outlet 122 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. The preheating medium exchanges heat with the adsorbent in the drop pipe 21 in the preheating section 12 and 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 between different areas in the entire heating section, alleviate the heat load of the heating section 13, and enable the overall temperature in the heating section to be stably maintained within the temperature range that meets the regeneration of the adsorbent.

[0058] Considering the preheating section and the heating section as a whole for heating the adsorbent, combined with the setting of the deflector assembly 3, compared with the process of heating the adsorbent only in the heating section in the related art, the embodiment of the present disclosure can increase the overall calorific value utilization rate of the preheating medium and the heating medium by more than 20%.

[0059] The arrangement of the baffles 31 in the preheating section 12 is similar to that of the baffles 31 in the heating section 13 and the cooling section 14, that is, the baffles 31 in the preheating section 12 are arranged at an axial tilt relative to the blanking tube 21, and multiple baffles 31 are arranged in the preheating section 12 at intervals to facilitate the guidance of 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 they will not be repeated here.

[0060] In some embodiments, the multiple baffles 31 of the baffle assembly 3 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 31 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 31 to flow along the inclined direction of the baffle 31.

[0061] That is to say, under normal circumstances, the first direction serves as 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 groups of baffle units arranged at intervals to evenly flow the heat exchange medium passing through the corresponding baffle units. The guidance of the heat exchange medium by multiple groups of baffle units can make the adsorbent in the corresponding drop pipe 21 heated more evenly and the desorption and regeneration effect more uniform.

[0062] As shown in FIG. 2 , in an optional embodiment, the first direction is the axial direction of the blanking tube 21 , and the multiple baffles 31 in each group of baffle units are equally spaced and arranged in parallel.

[0063] It should be noted that the parallel in the embodiment of the present disclosure includes parallel. For example, when the baffle 31 is a flat plate, the parallel arrangement of multiple baffles 31 is a parallel arrangement. When the baffle 31 is a V-shaped plate, the parallel arrangement of multiple baffles 31 is that the corresponding parts of the multiple baffles 31 are parallel.

[0064] That is to say, the arrangement of the multiple baffles 31 in the baffle unit is that the multiple baffles 31 located in the same baffle unit are parallel to each other, and the distance between two adjacent baffles 31 located 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.

[0065] As shown in Figures 1 and 2, the X direction in the figure is the first direction, the Y direction is the second direction, and 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 arranged on the lower side wall of the heating section 13, and the heating outlet 132 of the heating section 13 is arranged on the upper side wall of the heating section 13. When the baffle assembly 3 is arranged, the axial direction of the blanking tube 21 is used as the first direction, and the axial direction of the blanking tube 21 is used as the arrangement direction of the baffle unit. The baffles 31 located in the same baffle unit are all arranged in parallel, and the spacing distance between two adjacent baffles 31 located in the same baffle unit is the same, so that the heating medium in the plane orthogonal to the axial direction of the blanking tube 21 in the heating section 13 can be balanced, so that the adsorbent in the blanking tube 21 in the heating section 13 is heated more evenly.

[0066] Optionally, whether the spacing between two adjacent baffles 31 in different baffle units is the same can be adjusted according to actual application conditions. For example, taking the heating section 13 as an example, the inclination angle of the baffle and the spacing distance between two adjacent baffles 31 in the baffle unit near the heating inlet 131 and the heating outlet 132 in the heating section 13 are different from the inclination angle of the baffle and the spacing distance between two adjacent baffles 31 in the baffle unit located in the middle of the heating section 13, so as to more effectively adjust the flow direction of the medium near the heating inlet and the heating outlet 132, and reduce the influence of the flow direction of the medium near the heating inlet 131 and the heating outlet 132 in the heating section 13 on the flow direction of the medium in the middle of the heating section 13.

[0067] In an optional embodiment, among the multiple baffles 31 in each group of baffle units, the inclination direction of at least some of the baffles 31 is different from the inclination direction of other baffles 31.

[0068] That is to say, the inclination directions of the multiple baffles in the same baffle unit can be different, and a guide space with a varying opening and closing degree is formed between two adjacent baffles with different inclination directions, so that the heat exchange medium can be redistributed in the interval where the baffle unit is located, thereby improving the balance of the heat exchange medium.

[0069] Optionally, the arrangement of multiple baffles 31 in the baffle unit can be that the multiple baffles 31 located in the same baffle unit are partially arranged in parallel, and the multiple baffles 31 are arranged in sequence in a W shape in the second direction, that is, the baffles 31 at odd positions in the same baffle unit can be arranged in parallel with each other, and the baffles 31 at even positions can be arranged in parallel with each other.

[0070] In an optional embodiment, the multiple baffles 31 in each group of baffle units have the same inclination direction, and among the multiple groups of baffle units, the inclination direction of the baffles 31 in at least some of the baffle units is different from the inclination direction of the baffles 31 in other baffle units.

[0071] Alternatively, a feasible arrangement of the multiple baffles 31 within a baffle unit is to arrange the multiple baffles 31 within the same baffle unit in parallel, with the spacing between adjacent baffles 31 within the same baffle unit being the same, and the baffles 31 within two adjacent groups of baffle units having different inclinations to adjust the flow trajectory of the heat exchange medium. The different inclinations of the baffles within different baffle units result in the heat exchange medium having opposite flow directions after passing through the different baffle units. Since the heat exchange medium has a buffer space between adjacent baffle units, baffle counteraction and dead zones are avoided.

[0072] In some embodiments, the multiple baffles 31 in the baffle assembly 3 are divided into multiple groups of baffle units, and the multiple groups of baffle units are arranged at intervals along the axial direction of the blanking tube 21. The baffles 31 in the baffle units are spaced and arranged in parallel in a direction orthogonal to the axial direction of the blanking tube 21 to guide the corresponding medium between the adjacent baffles 31 to flow along the inclined direction of the baffle 31. The arrangement direction of the baffles 31 in at least two groups of baffle units is set at an angle.

[0073] That is to say, multiple groups of baffle units are arranged along the axial direction of the blanking tube 21, and the multiple baffles 31 in each group of baffle units are arranged along the axial direction orthogonal to the blanking tube 21. The inclination angles and directions of the multiple baffles 31 in each group of baffle units are the same. The baffles 31 in at least two groups of baffle units are arranged at a certain angle to guide the corresponding medium between the adjacent baffles 31 to flow along the inclination direction of the baffle 31, so that the flow direction of the heat exchange medium changes when passing through different baffle units.

[0074] Taking a strip-shaped flat plate with a length extension direction as the baffle 31 as an example, the parallel arrangement direction of the multiple baffles 31 in the baffle unit is orthogonal to the axial direction of the blanking tube 21 and the length extension direction of the baffle 31, so as to ensure that the heat exchange medium between the two adjacent baffles 31 can flow along the inclined direction of the baffle 31.

[0075] Optionally, in multiple groups of baffle units, the baffles 31 in some of the baffle units are arranged at intervals along the direction A that is orthogonal to the axial direction of the blanking tube 21, but the baffles 31 in the remaining baffle units are arranged at intervals along the direction B in a plane orthogonal to the axial direction of the blanking tube 21. The angle between the A direction and the B direction can be 10°-80°, for example, the angle between the A direction and the B direction can be 10°, 25°, 30°, 57° or 80°.

[0076] For example, taking the heating section 13 as an example, four groups of baffle units are arranged in the heating section 13, which are the first baffle unit, the second baffle unit, the third baffle unit and the fourth baffle unit along the axial direction of the blanking tube 21, wherein the arrangement direction of the baffles 31 in the first baffle unit, the second baffle unit and the third baffle unit is the same, and the arrangement direction of the baffles 31 in the fourth baffle unit is at an angle of 30°, 45° or 50° to the arrangement direction of the baffles 31 in the third baffle unit.

[0077] Furthermore, in some optional embodiments, there are at least three groups of baffle units, and the arrangement directions of the baffles 31 in the at least three groups of baffle units are set at an angle to guide the corresponding medium to flow in an axial spiral along the blanking pipe 21.

[0078] It should be noted that, with multiple baffles 31 as a baffle unit, at least three groups of baffle units are arranged at intervals along the axial direction of the drop tube 21, and the baffles 31 in the baffle unit are spaced and arranged in parallel in a direction orthogonal to the axial direction of the drop tube 21 to guide the corresponding medium between the two adjacent baffles 31 to flow along the inclined direction of the baffle 31. Multiple groups of baffle units can extend the distance traveled by the heat exchange medium by changing the arrangement direction of the baffle 31 to guide the heat exchange medium to flow in a spiral form along the axial direction of the drop tube 21. With the help of the inclined baffles 31, the medium flow is smoothed and the flow dead zone area is reduced.

[0079] In order to realize the spiral guidance of heat exchange medium by multiple groups of baffle units, the arrangement direction of the baffle 31 in the next baffle unit is obtained by rotating the arrangement direction of the baffle 31 in the previous baffle unit around the axial direction of the blanking tube 21. That is to say, the arrangement direction of the baffle 31 in one of the baffle units is used as a reference, and the arrangement direction of the baffle 31 in the baffle unit used as a reference is rotated clockwise or counterclockwise around the axial direction of the blanking tube 21 by a certain angle to form the next baffle unit, and so on, so that the arrangement directions of the baffles 31 in at least three groups of baffle units are set at an angle to guide the corresponding medium to flow in an axial spiral along the blanking tube 21. The angle of the arrangement direction of the baffle 31 in two adjacent baffle units can be selected in the range of 10°-80°, for example, 10°, 25°, 30°, 57° or 80°.

[0080] Taking the heating section 13 as an example, three groups of baffle units are arranged in the heating section 13, which are the first baffle unit, the second baffle unit and the third baffle unit along the axial direction of the blanking tube 21. The second baffle unit is obtained by rotating the arrangement direction of the baffle 31 in the first baffle unit 40° clockwise around the axial direction of the blanking tube 21, and the third baffle unit is obtained by rotating the arrangement direction of the baffle 31 in the second baffle unit 40° or 50° clockwise around the axial direction of the blanking tube 21.

[0081] In some embodiments, the baffle 31 is connected to the blanking tube 21 , and a gap is provided between the baffle 31 and the wall of the inner cavity.

[0082] That is to say, there is no dead angle between the baffle 31 and the inner wall of the tower body that prevents the heat exchange medium from flowing, which can facilitate the smooth flow of the heat exchange medium and reduce the flow dead zone. The drop pipe 21 can rely on the baffle 31 for support. The baffle 31 also has the function of heat dissipation fins, which can improve the heat exchange effect.

[0083] Optionally, according to the distribution of the baffle 31, a through hole corresponding to the blanking tube 21 is opened on the baffle 31 so that the blanking tube 21 can be passed through the baffle 31 during assembly. The baffle 31 can be connected to the blanking tube 21 through a connecting piece or by welding.

[0084] In the above embodiment, the baffles 31 are arranged in an array with a certain rule, which makes it easier to install the baffles 31, and also facilitates the effective guidance of the heat exchange medium and the simulation analysis of the dynamic flow of the gas, so as to reduce the side resistance or vortex formation of the heat exchange medium, and also reduces the difficulty of adjusting the baffles 31.

[0085] As shown in Figures 3 and 4, in some embodiments, the bottom surface 134 of the heating section 13 is an inclined surface, and an ash discharge portion 133 is provided on the heating section 13. The ash discharge portion 133 is provided at the lower end of the bottom surface 134 of the heating section 13 to discharge debris settled in the heating section 13.

[0086] It should be noted that when the heating medium entering the heating inlet 131 contains impurities such as smoke and dust, for example, the heating medium is unpurified flue gas, it will settle during the flow in the heating section 13. The smoke and dust settled on the deflector 31 can rely on the inclined deflector 31 to slide to the bottom of the heating section 13. The smoke and dust in the heating section 13 can be discharged from the ash discharge part 133 through the inclined bottom surface 134, so that the regeneration tower can use more heat sources to work and reduce the cost of the heat source.

[0087] When using a heating medium containing smoke and other debris, the baffle not only needs to guide the heating medium, but also needs to guide the settled debris to slide down. Therefore, the inclination angle of the baffle needs to be further optimized. The axial angle between the baffle and the blanking tube can be 10°-55° to avoid the baffle inclination angle being too gentle.

[0088] The baffle in the disclosed embodiment can strike a balance between the two functions of guiding the heating medium and guiding the smoke and dust and other debris to slide off. When the guidance of the heating medium in the heating section is affected because the baffle needs to satisfy the sliding of smoke and dust and other debris, the regeneration tower structure with the preheating section is used to compensate for it, thereby enabling the regeneration tower to achieve an overall performance improvement through multi-dimensional coordination.

[0089] Optionally, the ash discharge portion 133 is an ash discharge port provided on the heating section 13 , and the ash discharge port may be a circular opening or an elongated slot. A gate valve is provided on the ash discharge port, and when ash cleaning is required, ash cleaning is performed by opening the gate valve.

[0090] 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 settled debris is gathered by relying on 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 close to the ash discharge part 133 by relying on the inclination angle of the bottom surface 134 of the heating section 13, so as to facilitate discharge.

[0091] As shown in FIG5 , in the embodiment of the present disclosure, the adsorbent 41 can be a granular or powdered adsorbent, or an adsorbent body made of powder or granular adsorbent, such as a spherical body or a cylindrical body formed by a powder or granular adsorbent through 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 in a breathable outer shell 42 to form an adsorbent unit, wherein the breathable outer shell 42 has air holes, and the flue gas can enter the breathable outer shell 42 through the air holes. The flue gas can pass through the gaps between adjacent adsorbents 41 and / or the holes of the adsorbent itself, thereby reducing not only direct collisions, friction and wear between adsorbents, but also the generation of dust. The breathable outer shell can be in the shape of a rotating body such as a sphere or a cylinder, wherein the diameter of the adsorption unit is 10mm-100mm, and the diameter of the adsorbent is 1mm-10mm.

[0092] The following describes a low-temperature adsorption regeneration system according to an embodiment of the present disclosure.

[0093] The low-temperature adsorption regeneration system of the embodiment of the present disclosure includes an adsorption tower, a regeneration tower and a cooling tower. The adsorption tower has a flue gas inlet and a flue gas outlet. The flue gas enters the adsorption tower from the flue gas inlet and contacts and is adsorbed by the adsorbent in the adsorption tower. The flue gas purified by adsorption is discharged from the flue gas outlet. The regeneration tower is an adsorbent regeneration tower as in the above embodiment. The regeneration tower is connected to the adsorption tower and is used to regenerate the adsorption-saturated adsorbent discharged from the adsorption tower and return the regenerated adsorbent to the adsorption tower. The cooling tower is connected to the adsorption tower and is used to cool the flue gas to below room temperature and then transport it to the flue gas inlet of the adsorption tower.

[0094] The low-temperature adsorption regeneration system of the disclosed embodiment can reduce the flow resistance of the heating medium, minimize the area of ​​the flow dead zone, and improve the adsorbent regeneration effect. Furthermore, the low-temperature adsorption regeneration system of the disclosed embodiment can also cool the high-temperature flue gas to below room temperature, so that the adsorbent in the adsorption tower and the flue gas come into contact in an environment below room temperature. Compared to the activity of the adsorbent in a high-temperature environment, the activity of the adsorbent below room temperature can be increased by dozens or even hundreds of times, thereby further improving the flue gas purification efficiency and effectiveness, achieving near-zero emissions.

[0095] The low temperature in the embodiment of the present disclosure is below room temperature, optionally, below zero degrees Celsius, and more optionally, -20°C to -10°C. The inventors have found through research that the lower the flue gas temperature, the more beneficial it is for adsorption purification. However, if the flue gas temperature is too low, the equipment structure for cooling the flue gas will be complicated and energy consumption will increase. For example, it is required to set up an insulation layer for the cooling equipment, adsorption tower and pipeline, and the sealing requirements are high, which will lead to increased costs. In addition, too low a temperature condition will easily lead to condensation water in the adsorption tower, causing the adsorbent to stick and clog, affecting adsorption. Therefore, it is beneficial to cool the flue gas temperature to -20°C to -10°C.

[0096] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0097] 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 being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0098] In this disclosure, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication between them; direct connections or indirect connections through an intermediate medium; and internal communication between two elements or interaction between two elements, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0099] In the present disclosure, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0100] In the present disclosure, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0101] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present disclosure.

Claims

1. An adsorbent regeneration tower, comprising: A tower body, the inner cavity of the tower body includes a cloth-feeding section and a heating section located below the cloth-feeding section. The cloth-feeding section is located at the topmost part 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 blanking assembly, the blanking assembly includes a plurality of blanking pipes, the blanking assembly is arranged in the heating section, and the adsorbent entering the heating section from the cloth-feeding section falls through the blanking pipes; A baffle assembly, the baffle assembly is arranged in the heating section and includes a plurality of baffle plates. The baffle plates are inclined relative to the axial direction of the blanking pipes. The plurality of baffle plates are arranged in the heating section at intervals to guide the heating medium to flow in the heating section to heat the adsorbent in the blanking pipes in the heating section to desorb and regenerate the adsorbent.

2. The adsorbent regeneration tower according to claim 1, wherein the inner cavity of the tower body further includes a cooling section, the cooling section is located at the bottommost part of the inner cavity of the tower body, the blanking assembly and the baffle assembly are also arranged in the cooling section. The adsorbent desorbed and regenerated in the heating section enters the cooling section and falls through the blanking pipes in the cooling section. The baffle plates in the cooling section are used to guide the cooling medium to flow in the cooling section to cool the adsorbent in the blanking pipes in the cooling section.

3. The adsorbent regeneration tower according to claim 1 or 2, wherein the inner cavity of the tower body further includes a preheating section, the preheating section is arranged between the cloth-feeding section and the heating section, the blanking assembly and the baffle assembly are also arranged in the preheating section. The adsorbent entering the preheating section from the cloth-feeding section enters the preheating section and falls through the blanking pipes in the preheating section to the heating section. The baffle plates in the preheating section are used to guide the preheating medium to flow in the preheating section to preheat the adsorbent in the blanking pipes in the preheating section.

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

5. The adsorbent regeneration tower according to claim 4, wherein the first direction is the axial direction of the blanking pipes, and the plurality of baffle plates in each group of baffle plate units are arranged at equal intervals and in parallel.

6. The adsorbent regeneration tower according to claim 4 or 5, wherein among the plurality of baffle plates in each group of baffle plate units, at least some of the baffle plates have an inclined direction different from that of other baffle plates; Or, the plurality of baffle plates in each group of baffle plate units have the same inclined direction, and among the multiple groups of baffle plate units, at least some of the baffle plates in some baffle plate units have an inclined direction different from that of the baffle plates in other baffle plate units.

7. The adsorbent regeneration tower according to any one of claims 1 to 3, wherein the multiple baffles in the baffle assembly are divided into multiple groups of baffle units, the multiple groups of baffle units are arranged at intervals along the axial direction of the drop tube, and the baffles in the baffle units are arranged at intervals and in parallel along a direction orthogonal to the axial direction of the drop tube to guide the corresponding medium between two adjacent baffles to flow along the inclined direction of the baffles; The baffles in at least two groups of baffle units are arranged at an angle.

8. The adsorbent regeneration tower according to claim 7, wherein the baffle units are in at least three groups, and the arrangement directions of the baffles in at least three groups of baffle units are set at an angle to guide the corresponding medium to flow in an axial spiral along the drop pipe.

9. The adsorbent regeneration tower according to any one of claims 1 to 8, wherein the bottom surface of the heating section is an inclined surface, and an ash discharge portion is provided on the heating section, and the ash discharge portion is provided at the low end of the bottom surface of the heating section to discharge debris settled in the heating section.

10. A low temperature adsorption regeneration system comprising: An adsorption tower, wherein the adsorption tower has a flue gas inlet and a flue gas outlet, and 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, and the adsorbed and purified flue gas is discharged from the flue gas outlet; A regeneration tower, wherein the regeneration tower is an adsorbent regeneration tower according to any one of claims 1 to 9, the regeneration tower is connected to the adsorption tower, and is used to regenerate the adsorbent saturated with adsorption discharged from the adsorption tower and return the regenerated adsorbent to the adsorption tower; and A cooling tower is connected to the adsorption tower and is used to cool the flue gas into low-temperature flue gas below room temperature and transport it to the flue gas inlet of the adsorption tower.

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