Low-temperature flue gas adsorption tower having flue gas flow guide function, and low-temperature flue gas adsorption system

Abstract

Disclosed are a low-temperature flue gas adsorption tower having a flue gas flow guide function, and a low-temperature flue gas adsorption system. The low-temperature flue gas adsorption tower having a flue gas flow guide function comprises a tower body and a flow guide component. An adsorption bed is provided in the tower body. The flow guide component comprises a plurality of guide plates. The plurality of guide plates are arranged spaced apart from one another in the tower body so that at least some sections of the adsorption bed are partitioned into a plurality of flow guide channels for guiding a flue gas and an adsorbent, the flue gas and the adsorbent oppositely flowing in the flow guide channels.

Description

Low-temperature flue gas adsorption tower and low-temperature flue gas adsorption system with flue gas diversion function

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 2023115683715 filed in China on November 23, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the technical field of flue gas adsorption purification, and in particular to a low-temperature flue gas adsorption tower and a low-temperature flue gas adsorption system with a flue gas diversion function. Background Art

[0004] Adsorption purification is a common method for removing pollutants from coal-fired flue gas. During the adsorption purification process, the flue gas enters the adsorption tower through the flue gas inlet. The flue gas passes through the adsorption bed in the adsorption tower, where the adsorbent in the adsorption bed adsorbs the pollutants in the flue gas. After passing through the adsorption bed, the flue gas is purified and discharged from the flue gas outlet. Traditionally, flue gas adsorption purification is usually high-temperature adsorption, that is, the flue gas discharged from the boiler is cooled to approximately 200°C through a cooling tower and then enters the adsorption tower for high-temperature adsorption purification. High-temperature adsorption has the problems of high adsorbent consumption, poor adsorption effect, high nitrogen oxide content in the clean flue gas after adsorption, and inability to achieve near-zero emissions.

[0005] Summary of the Invention

[0006] The present disclosure is based on the inventors' findings and understanding of the following facts and problems:

[0007] In order to overcome the problem of high-temperature adsorption, the relevant technology has proposed a flue gas low-temperature adsorption technology, which is to cool the flue gas to a low-temperature flue gas such as below room temperature, and then remove the pollutant components in the flue gas by adsorption. In low-temperature adsorption, the adsorption capacity of the adsorbent is increased exponentially in a low-temperature environment, which greatly improves the adsorption purification rate compared with conventional high-temperature flue gas adsorption, and can achieve near-zero emissions of flue gas. However, the inventors realized through research that compared with conventional high-temperature adsorption, in the low-temperature adsorption process, the diffusion rate of low-temperature flue gas is low, and the flow of low-temperature flue gas in the adsorption tower is uncontrolled. When the flue gas passes through the adsorption bed, it is difficult for the flue gas to contact the adsorbent evenly, resulting in a significantly higher amount of flue gas passing through some areas of the adsorption bed, resulting in inconsistent flue gas purification levels, affecting the flue gas adsorption effect, and resulting in different amounts of pollutants adsorbed by the adsorbent, and too large a difference in the adsorption saturation of the adsorbent, resulting in a large amount of adsorbent used, wasting the adsorption capacity of the adsorbent, and increasing costs.

[0008] In related art, to ensure uniform flue gas distribution, a gas distribution duct is typically installed at the flue gas inlet of the adsorption tower. However, the inventors discovered that because the adsorption bed is composed of a certain thickness of adsorbent, and the direction of flue gas flow within the bed cannot be controlled after entering, the amount of flue gas passing through different areas of the bed still varies significantly. This leads to inconsistent flue gas purification levels and different adsorption saturation levels of the adsorbent in different areas, affecting the flue gas adsorption effect and adsorbent utilization. This problem is particularly pronounced for low-temperature adsorption due to the slow diffusion of flue gas.

[0009] The present disclosure aims to address, at least to some extent, one of the technical problems in the related art. To this end, a first embodiment of the present disclosure proposes a low-temperature flue gas adsorption tower with a flue gas diversion function. This tower can guide the flow of flue gas within the adsorption tower, thereby improving the uniform contact between the flue gas and the adsorbent, resulting in a uniform degree of flue gas purification and increased consistency in adsorption saturation of the adsorbent.

[0010] A second embodiment of the present disclosure provides a low-temperature flue gas adsorption system.

[0011] A low-temperature flue gas adsorption tower with a flue gas diversion function according to an embodiment of the first aspect of the present disclosure includes:

[0012] A tower body, wherein an adsorption bed is disposed within the tower body, and the tower body has a feeding port, a discharging port, a flue gas inlet, and a flue gas outlet. Adsorbent is fed into the tower body through the feeding port and is accumulated within the tower body to form the adsorption bed. Low-temperature flue gas below room temperature is fed into the tower body through the flue gas inlet and contacts the adsorbent within the adsorption bed to be adsorbed and purified into clean flue gas, which is discharged through the flue gas outlet.

[0013] a flow guide component, the flow guide component comprising a plurality of guide plates, the plurality of guide plates being spaced apart from each other and arranged in the tower body to separate at least a portion of the adsorption bed into a plurality of flow guide channels for guiding the flue gas and adsorbent, the flue gas and adsorbent flowing in opposite directions in the flow guide channels;

[0014] a mixing assembly comprising a barrier component and a spoiler component;

[0015] The partition member is arranged in the tower body to form a flue gas mixing space in the adsorption bed, the partition member has an adsorbent flow channel and a plurality of flue gas through-holes, the adsorbent flow channel is used for allowing the adsorbent to flow from above the flue gas mixing space through the flue gas mixing space to below the flue gas mixing space, wherein the flue gas entering the flue gas mixing space from below the flue gas mixing space directly flows into the adsorption bed above the flue gas mixing space through the flue gas through-holes, and / or enters the adsorbent flow channel through the flue gas through-holes to flow into the adsorption bed above the flue gas mixing space through the adsorbent flow channel;

[0016] The flow-disturbing component is in communication with the smoke mixing space and is used to disturb the smoke in the smoke mixing space so that the smoke in the smoke mixing space is evenly mixed.

[0017] The spoiler component comprises:

[0018] an air extraction pipe and an air supply pipe communicating with the smoke mixing space;

[0019] A driver is provided between the exhaust pipe and the air supply pipe, and is used to drive the smoke in the smoke mixing space to flow out of the exhaust pipe and flow into the smoke mixing space from the air supply pipe to forcibly disturb and mix the smoke in the smoke mixing space.

[0020] The low-temperature flue gas adsorption tower with flue gas diversion function of the disclosed embodiment divides the adsorption bed using multiple guide plates to form multiple relatively independent diversion channels. This facilitates the opposite flow of flue gas and adsorbent within the diversion channels, controlling the direction of flue gas flow and helping to improve the uniformity of flue gas distribution on the same horizontal plane. This ensures that the amount of flue gas purified by adsorbent in different areas is more consistent, and the adsorption saturation of the adsorbent is more consistent, thereby improving the flue gas purification and adsorption effect, increasing the utilization rate of the adsorbent, and reducing costs. This effect is particularly significant for low-temperature adsorption.

[0021] The disclosed embodiments form a flue gas mixing space within the adsorption bed, allowing the flue gas entering the flue gas mixing space to mix under the action of the flow-turbulating component. This further improves the uniformity of flue gas distribution on the same horizontal plane, enhances the consistency of the adsorbent's adsorption saturation, and further enhances the flue gas adsorption purification effect and the utilization rate of the adsorbent's adsorption capacity and capacity. This effect is particularly significant for low-temperature adsorption.

[0022] In the embodiment of the present disclosure, a driver is provided to force mixing of the smoke in the smoke mixing space, thereby further improving the mixing effect and uniform distribution of the smoke in the smoke mixing space.

[0023] In some embodiments, the plurality of guide plates are divided into a plurality of layers of guide plate units, each layer of guide plate units includes a plurality of guide plates spaced apart from each other and arranged in parallel, and the plurality of layers of guide plate units are spaced apart from each other in a vertical direction.

[0024] By arranging multiple layers of guide plate units at intervals in the vertical direction, the embodiment of the present disclosure can specifically adjust the area with uneven airflow distribution according to the flow direction of the airflow in the adsorption bed, thereby reducing the use of guide plates and lowering costs.

[0025] In some embodiments, in the longitudinal section of the tower body, the angle between the guide plate and the vertical direction is 0°-40°, and / or the guide plates in different guide plate units are arranged in parallel with each other or their projections in the same horizontal section of the tower body intersect.

[0026] The guide plates of the disclosed embodiments can be arranged vertically or at an angle to the vertical. When arranged at an angle, the airflow and adsorbent can flow diagonally between adjacent guide plates, adjusting the airflow direction within the adsorption bed. By adjusting the orientation of the guide plates within different guide plate unit layers, the adsorption bed can be divided into different sections along the same or different directions, enabling the adsorbent and flue gas to be redistributed during flow, improving the uniformity of flue gas distribution and the adsorption purification effect.

[0027] In some embodiments, the multiple guide plates are divided into a first group of guide plate units and a second group of guide plate units, the first group of guide plate units includes a plurality of first guide plates spaced apart from each other and arranged in parallel along a first direction, the second group of guide plate units includes a plurality of second guide plates spaced apart from each other and arranged in parallel along a second direction, the first direction and the second direction are both orthogonal to the vertical direction, the angle between the first direction and the second direction is 60°-90°, the first guide plate and the second guide plate intersect with each other so that the guide component in the cross section of the tower body is frame-shaped.

[0028] The embodiment of the present disclosure can divide the adsorption bed into multiple guide channels arranged in an array through the guide plate, so that the flue gas and the adsorbent can effectively contact each other in the guide channel, ensuring that the flue gas entering the guide channel can flow in a nearly vertical direction, and the flow direction of the flue gas can be better controlled to improve the adsorption and purification effect of the flue gas.

[0029] In some embodiments, the aperture of the smoke through hole is smaller than the particle size of the adsorbent to prevent the adsorbent from entering the smoke mixing space through the smoke through hole; and / or

[0030] The partition component includes a partition and a plurality of drop tubes, the upper ends of the drop tubes are connected to the partition, the inner cavities of the drop tubes form the adsorbent flow channels, the plurality of drop tubes are spaced apart from each other to form the flue gas mixing space, and the flue gas through-holes are provided on the partition and / or on the side walls of the drop tubes so that the flue gas in the flue gas mixing space flows through the flue gas through-holes to the adsorption bed above the partition; and / or

[0031] The partition component includes a plurality of drop pipes, each of which is an inverted cone-shaped drop hopper. The inner cavity of the drop pipe forms the adsorbent flow channel. The outer circumferences of the upper ends of the drop pipes are connected to each other to prevent the flue gas in the flue gas mixing space from flowing through the outer circumferences of the upper ends of the drop pipes to the adsorption bed above the flue gas mixing space. The lower ends of the drop pipes are spaced apart from each other to form the flue gas mixing space. The flue gas through-holes are provided on the side walls of the drop pipes so that the flue gas in the flue gas mixing space flows into the drop pipes through the flue gas through-holes and flows through the inner cavity of the drop pipes to the adsorption bed above the partition.

[0032] The embodiment of the present disclosure can prevent the adsorbent from entering the flue gas mixing space through the flue gas through-holes by controlling the aperture of the flue gas through-holes, so that the adsorbent can only flow through the adsorbent flow channel, so that a relatively stable flue gas mixing space can be formed in the adsorption bed to achieve staged mixing of the flue gas.

[0033] The embodiment of the present disclosure sets a drop pipe to allow the adsorbent to flow downward through the inner cavity of the drop pipe, and sets a partition to prevent the adsorbent from flowing downward from the outside of the drop pipe, so that a flue gas mixing space can be formed between the partition and the bottom of the drop pipe, between the adsorbent layer above the partition and the adsorbent layer below the drop pipe. The flue gas holes can be set on the partition and / or the side wall of the drop pipe. The flue gas holes on the partition can allow the flue gas to directly enter the adsorbent layer above the flue gas mixing space, and the flue gas holes on the side wall of the drop pipe can allow the flue gas to first enter the drop pipe and then rise to the adsorbent layer above the partition.

[0034] The embodiment of the present disclosure sets an inverted cone-shaped drop hopper so that the outer peripheries of the upper ends of the drop pipes are connected to each other to prevent the adsorbent from flowing from the outside of the drop pipes. The lower ends of the drop pipes are spaced apart from each other to form a flue gas mixing space. The flue gas flows into the drop pipe through the flue gas holes on the side walls of the drop pipes, and then rises to the adsorbent material layer above the partition.

[0035] In some embodiments, a cooling module is provided on the exhaust pipe and / or the air supply pipe, and the cooling module is used to cool the flue gas flowing through the exhaust pipe and / or the air supply pipe.

[0036] In the embodiment of the present disclosure, a cooling module is provided to cool the flue gas in the exhaust pipe and / or the air supply pipe, so as to improve the purification effect of the adsorbent on the flue gas.

[0037] In some embodiments, the low-temperature flue gas adsorption tower with flue gas diversion function also includes an air distribution component, which is arranged in the tower body and located below the adsorption bed, and is used to disperse and evenly distribute the flue gas entering the tower body through the flue gas inlet.

[0038] The embodiment of the present disclosure can distribute the flue gas at the flue gas inlet through the gas distribution component, so that the flue gas is evenly dispersed below the adsorption bed, and the flue gas entering the adsorption bed is relatively uniform on the same horizontal plane.

[0039] The low-temperature flue gas adsorption system according to the second embodiment of the present disclosure includes:

[0040] A cooling tower, wherein the cooling tower is used to cool the flue gas to a low temperature flue gas below room temperature;

[0041] an adsorption tower, wherein the adsorption tower is a low-temperature flue gas adsorption tower with a flue gas diversion function according to any embodiment of the first aspect above, wherein the low-temperature flue gas enters the adsorption tower from the flue gas inlet, contacts with the adsorbent in the adsorption tower, is adsorbed and purified into clean flue gas, and is discharged from the flue gas outlet;

[0042] A 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.

[0043] The low-temperature flue gas adsorption system of the embodiment of the present disclosure can cool the flue gas, and the flue gas contacts the adsorbent in a low-temperature environment, which improves the adsorption effect of the adsorbent on pollutants in the flue gas and can achieve near-zero emissions. In addition, the adsorbent can be regenerated through a regeneration tower, so that the adsorbent can be continuously recycled, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG1 is a schematic structural diagram of a low-temperature flue gas adsorption tower with a flue gas diversion function according to an embodiment of the present disclosure.

[0045] FIG2 is a schematic structural diagram of a low-temperature flue gas adsorption tower with a flue gas diversion function according to another embodiment of the present disclosure.

[0046] FIG3 is a schematic structural diagram of a low-temperature flue gas adsorption tower with a flue gas diversion function according to another embodiment of the present disclosure.

[0047] FIG4 is a schematic top view of the arrangement of the guide plate according to an embodiment of the present disclosure.

[0048] FIG5 is a schematic structural diagram of a low-temperature flue gas adsorption tower with a flue gas diversion function according to another embodiment of the present disclosure.

[0049] FIG6 is a schematic structural diagram of an interlayer component according to an embodiment of the present disclosure.

[0050] FIG7 is a schematic structural diagram of an interlayer component according to another embodiment of the present disclosure.

[0051] FIG8 is a schematic structural diagram of an adsorbent unit in an embodiment of the present disclosure.

[0052] Figure numerals: Tower body 100, feeding port 101, discharge port 102, flue gas inlet 103, flue gas outlet 104; guide plate 200; partition component 300, feeding pipe 301, flue gas through hole 302, flue gas mixing space 303, partition 304; spoiler component 400, exhaust pipe 401, air supply pipe 402, driver 403, cooling module 404; air distribution component 500; adsorption bed 600; adsorbent 701, breathable shell 702. DETAILED DESCRIPTION

[0053] 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.

[0054] 1 to 8 , a low-temperature flue gas adsorption tower with a flue gas diversion function according to an embodiment of the present disclosure is described. The low-temperature flue gas adsorption tower with a flue gas diversion function comprises a tower body 100, wherein an adsorption bed 600 is provided in the tower body 100. The tower body 100 has a feeding port 101, a discharging port 102, a flue gas inlet 103 and a flue gas outlet 104. The adsorbent is input into the tower body 100 through the feeding port 101 and is accumulated in the tower body 100 to form an adsorption bed 600. The low-temperature flue gas below room temperature is input into the tower body 100 through the flue gas inlet 103 and is adsorbed and purified into clean flue gas by contacting with the adsorbent in the adsorption bed 600 and is discharged from the flue gas outlet 104.

[0055] A flow guide component is provided in the tower body 100, which includes a plurality of guide plates 200. The plurality of guide plates 200 are arranged at intervals in the tower body 100 to separate at least part of the adsorption bed 600 into a plurality of flow guide channels for guiding the flue gas and the adsorbent. The flue gas and the adsorbent flow in opposite directions in the flow guide channels.

[0056] The low-temperature flue gas adsorption tower with flue gas diversion function of the disclosed embodiment improves the purification effect by performing low-temperature adsorption on flue gas under low-temperature conditions, thereby achieving near-zero emissions. Furthermore, the adsorption bed 600 is divided by multiple guide plates 200 to form multiple relatively independent diversion channels. The flue gas and adsorbent flow in opposite directions within the diversion channels, thereby controlling the flow direction of the flue gas and helping to improve the uniformity of flue gas distribution on the same horizontal plane. This ensures that the amount of flue gas treated by the adsorbent in different areas is more consistent, and the adsorption saturation of the adsorbent is also more consistent, thereby improving the flue gas purification and adsorption effect and increasing the utilization rate of the adsorbent.

[0057] In some embodiments, the low temperature in the embodiments of the present disclosure is below room temperature. In some embodiments, the low temperature is below zero degrees Celsius. In some embodiments, the low temperature is -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 cause condensation water to appear 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.

[0058] 2 and 3 , in some embodiments, the plurality of guide plates 200 are divided into multi-layer guide plate units. Each layer of guide plate units includes a plurality of guide plates 200 spaced apart from each other and arranged in parallel. The multi-layer guide plate units are spaced apart from each other in the vertical direction.

[0059] Specifically, the disclosed embodiments arrange multiple layers of guide plate units at intervals in the vertical direction. This allows targeted adjustments to areas of uneven airflow distribution based on the direction of airflow in the adsorption bed 600, thereby reducing the number of guide plates 200 used and lowering costs. Parallel includes parallelism. When the guide plates are flat, parallel means parallel. When the guide plates are shaped like circular arc plates or V-shaped plates, parallel means that corresponding sections of multiple guide plates are parallel to each other, or that guide plates of the same shape are arranged in an array along a single direction. In some embodiments, the multiple guide plates in the guide plate unit are spaced apart and arranged in parallel along a direction perpendicular to the vertical direction.

[0060] In some embodiments, the guide plate units spaced apart in the vertical direction are two, three or five layers. The number of layers of the guide plate units can be reasonably selected according to the vertical height of the guide plate units and the vertical height of the adsorption bed 600.

[0061] The sum of the vertical heights of the multiple guide plate units is no less than 1 / 3 of the vertical height of the adsorption bed and no greater than 3 / 4 of the vertical height of the adsorption bed. When the thickness of the adsorption bed is less than 1500 mm, two sets of guide plate units are provided. When the thickness of the adsorption bed is greater than 1500 mm, one set of guide plate units is added to the adsorption bed for every 500 mm to 1000 mm increase in the vertical height of the adsorption bed.

[0062] For example, the distribution of flue gas at the upper and lower ends of the adsorption bed 600 is easily affected by the airflow at the flue gas inlet 103 and the flue gas outlet 104. Therefore, a layer of guide plate units is provided near the top and bottom of the adsorption bed 600. When the thickness of the adsorption bed 600 between the topmost and bottommost guide plate units is relatively large, for example, when the thickness is greater than 2000 mm, an additional set of guide plate units can be added to the adsorption bed 600 to further enhance the airflow guidance effect and promote more uniform distribution of flue gas within the adsorption bed 600.

[0063] In some embodiments, in the longitudinal section of the tower body 100 , the included angle between the guide plate 200 and the vertical direction is 0°-40°.

[0064] That is to say, the guide plate 200 of the embodiment of the present disclosure is arranged vertically, that is, the angle between the guide plate 200 and the vertical direction is 0°, or the guide plate 200 is arranged at a certain angle to the vertical direction. When the guide plate 200 is arranged at an angle to the vertical direction, the airflow and the adsorbent can flow obliquely between two adjacent guide plates 200, which is used to adjust the direction of the airflow in the adsorption bed 600.

[0065] In the longitudinal section of the tower body 100, the angle between the guide plate 200 and the vertical direction is not greater than 40°. The angle between the guide plate 200 and the vertical direction can be 5°, 15°, 23°, 36° or 40°. When the angle between the guide plate 200 and the vertical direction is greater than 40°, the guide plate 200 will be too flat, affecting the flow of the adsorbent, and will also cause the adsorbent travel difference in different areas of the adsorption bed 600 to be too large, which is not conducive to the contact between the flue gas and the adsorbent.

[0066] In some embodiments, in the longitudinal section of the tower body 100 , the included angle between the guide plate 200 and the vertical direction is 0°-30°.

[0067] In some embodiments, due to the influence of the arrangement positions of the flue gas inlet 103 and the flue gas outlet 104, when multiple layers of guide plate units are arranged in the adsorption bed 600, the guide plate 200 in the bottom guide plate unit is tilted toward the flue gas inlet 103, and the guide plate 200 in the top guide plate unit is tilted toward the flue gas outlet 104, so as to improve the influence of the airflow of the flue gas inlet 103 and the flue gas outlet 104 on the flow direction of the flue gas in the adsorption bed 600.

[0068] As shown in Figure 3, the guide plate in the guide plate unit located at the bottom is tilted to the left, and the guide plate in the guide plate unit located at the top is tilted to the right, so that the flue gas in the adsorption bed can be guided, so that the flue gas flows in a zigzag shape in the adsorption bed, and the adsorbent can also flow in a zigzag shape. In other words, the embodiment of the present disclosure can not only extend the flow path length of the flue gas within the limited height range of the adsorption bed, but also increase the flow path length of the adsorbent. In addition, when the adsorbent flows from top to bottom, when passing through the guide plate unit, the adsorbent can flow along the inclined direction of the guide plate, and when not passing through the guide plate unit, the adsorbent can flow in the vertical direction, so that the adsorbent can move in both the vertical and horizontal directions, and the adsorbent can be mixed, thereby improving the adsorption and purification effect of the adsorbent on the flue gas.

[0069] In some embodiments, the guide plates 200 in different guide plate units are arranged in parallel with each other or their projections in the same horizontal cross section of the tower body 100 intersect with each other.

[0070] That is to say, by setting the arrangement direction of the guide plates 200 in different guide plate units, the adsorption beds 600 in different sections can be divided in the same direction or different directions, so that the adsorbent and flue gas can be redistributed during the flow process, thereby improving the uniformity of flue gas distribution and the adsorption purification effect.

[0071] For example, as shown in FIG2 , the plurality of guide plates in the two-layer guide plate unit are arranged at intervals along the left-right direction.

[0072] For another example, in two adjacent layers of guide plate units, the multiple guide plates 200 in the guide plate units on the lower side are arranged at intervals along the left-right direction, and the multiple guide plates 200 in the guide plate units on the upper side are arranged at intervals along the front-back direction, that is, the arrangement direction of the guide plates in the two adjacent groups of guide plate units is at an angle of 90°. The arrangement direction of the guide plates in the two adjacent groups of guide plate units can also be 30°, 44°, 56°, etc.

[0073] For another example, as shown in FIG3 , the guide plates in two layers of guide plate units are spaced apart in the left-right direction, but the guide plates in the bottom guide plate unit are tilted to the left at a 30-degree angle relative to the vertical direction, while the guide plates in the top guide plate unit are tilted to the right at a 30-degree angle relative to the vertical direction. In some embodiments, the vertical distance between two adjacent layers of guide plate units is 50 mm to 400 mm.

[0074] In some embodiments, multiple guide plates 200 are divided into a first group of guide plate units and a second group of guide plate units. The first group of guide plate units includes a plurality of first guide plates spaced apart from each other and arranged in parallel along a first direction. The second group of guide plate units includes a plurality of second guide plates spaced apart from each other and arranged in parallel along a second direction. The first direction and the second direction are both orthogonal to the vertical direction. The angle between the first direction and the second direction is 60°-90°. The first guide plates and the second guide plates intersect on the same horizontal cross-section so that the guide component in the cross-section of the tower body 100 is frame-shaped.

[0075] Specifically, in the embodiment of the present disclosure, the adsorption bed 600 is divided into a plurality of guide channels arranged in an array by the guide plate 200, so that the flue gas and the adsorbent can contact more effectively in the guide channel, ensuring that the flue gas entering the guide channel can flow in a nearly vertical direction, and the flow direction of the flue gas can be better controlled to improve the adsorption and purification effect of the flue gas.

[0076] As shown in FIG4 , a schematic diagram of the arrangement of the first group of guide plate units and the second group of guide plate units is shown from a top view. The first guide plate and the second guide plate are both parallel to the vertical direction, and are arranged at an angle of 90°.

[0077] In the embodiment of the present disclosure, by limiting and constraining the angle between the first direction and the second direction, the cross-section of the formed guide channel can be rectangular or diamond-shaped. When the cross-section of the guide channel is diamond-shaped, if the angle of the end angle of the guide channel is too small, the adsorbent will not flow smoothly at the end angle of the guide channel, and both the adsorbent and the flue gas will form flow dead zones at the end angles of the guide channel, which is not conducive to the adsorption and purification of the flue gas. Therefore, the angle between the first direction and the second direction should not be less than 60°, and the value of the angle can be 60°, 65°, 73°, 79°, 84° or 90°. When the angle is 90°, the cross-section of the guide channel is rectangular.

[0078] As shown in Figure 5, in some embodiments, the low-temperature flue gas adsorption tower with flue gas diversion function also includes a mixing component, which is arranged between two groups of guide plate units and is used to mix the flue gas and then redistribute it to improve the uniformity of the flue gas distribution in the adsorption bed 600. The mixing component includes a partition component 300 and a spoiler component 400. The partition component 300 is arranged in the tower body 100 to form a flue gas mixing space 303 in the adsorption bed 600.

[0079] The partition component 300 has an adsorbent flow channel and multiple flue gas through-holes 302. The adsorbent flow channel is used for allowing the adsorbent to flow from above the flue gas mixing space 303 through the flue gas mixing space 303 to below the flue gas mixing space 303, wherein the flue gas entering the flue gas mixing space 303 from below the flue gas mixing space 303 flows directly to the adsorption bed 600 above the flue gas mixing space 303 through the flue gas through-holes 302 and / or enters the adsorbent flow channel through the flue gas through-holes 302 to flow to the adsorption bed 600 above the flue gas mixing space 303 through the adsorbent flow channel.

[0080] In some embodiments, in order to improve the fluidity of the smoke in the smoke mixing space 303 and enable the smoke to be more fully mixed within a limited stroke, the embodiment of the present disclosure is also provided with a spoiler component 400, which is connected to the smoke mixing space 303 and is used to disturb the smoke in the smoke mixing space 303 so that the smoke in the smoke mixing space 303 is mixed more evenly. After entering the smoke mixing space 303, the smoke can not only diffuse by itself, but also be forced to mix by the action of the spoiler component 400.

[0081] In the embodiment of the present disclosure, a flue gas mixing space 303 is formed in the adsorption bed 600, so that the flue gas entering the flue gas mixing space 303 is mixed under the action of the spoiler component 400, so as to improve the uniformity of the flue gas distribution on the same horizontal plane, make the adsorption saturation of the adsorbent more consistent, and improve the flue gas adsorption purification effect and the utilization rate of the adsorbent.

[0082] In some embodiments, the aperture of the smoke through hole 302 is smaller than the particle size of the adsorbent to prevent the adsorbent from entering the smoke mixing space 303 through the smoke through hole 302 .

[0083] The embodiment of the present disclosure controls the aperture of the flue gas through-hole 302 to prevent the adsorbent from entering the flue gas mixing space 303 through the flue gas through-hole 302, so that the adsorbent can only flow through the adsorbent flow channel, thereby forming a relatively stable flue gas mixing space 303 in the adsorption bed 600 to achieve staged mixing of the flue gas.

[0084] In some embodiments, as shown in FIG8 , the adsorbent 701 in the embodiment of the present disclosure may be a granular or powdered adsorbent, or an adsorbent body made of a powdered or granular adsorbent, such as a spherical body or a cylindrical body formed by a powdered or granular adsorbent 701 through a binder. Of course, a protective shell may be further formed outside 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 may be filled in a breathable outer shell 702 to form an adsorbent unit, wherein the breathable outer shell has air holes, and the flue gas may pass through the air holes into the breathable outer shell 702, and the flue gas may pass through the gaps between adjacent adsorbents and / or the holes of the adsorbent itself, thereby not only reducing direct collisions, friction and wear between adsorbents, but also the generation of dust. The breathable outer shell may be in the shape of a rotating body such as a sphere or a cylinder, wherein the diameter of the adsorption unit is 10 mm-100 mm, and the diameter of the adsorbent is 1 mm-10 mm.

[0085] Therefore, when the adsorption bed 600 in the embodiment of the present disclosure is formed by stacking adsorbent particles or adsorbent bodies, the pore size of the flue gas through-hole 302 is smaller than the particle size of the adsorbent particles; when the adsorption bed 600 is formed by stacking adsorbent units, the pore size of the flue gas through-hole 302 is smaller than the particle size of the adsorbent unit.

[0086] As shown in Figures 5 and 6, in some embodiments, the partition component 300 includes a partition 304 and multiple drop pipes 301, the upper end of the drop pipe 301 is connected to the partition 304, the inner cavity of the drop pipe 301 forms an adsorbent flow channel, and the multiple drop pipes 301 are arranged at intervals from each other to form a flue gas mixing space 303.

[0087] The flue gas through holes 302 are provided on the partition 304 and / or on the side wall of the drop pipe 301 so that the flue gas in the flue gas mixing space 303 flows into the adsorption bed 600 above the partition 304 through the flue gas through holes 302 .

[0088] In the embodiment of the present disclosure, a drop pipe 301 is provided to allow the adsorbent to flow downward through the inner cavity of the drop pipe 301, and a partition 304 is provided to prevent the adsorbent from flowing downward from the outside of the drop pipe 301, so that a flue gas mixing space 303 between the adsorbent layer above the partition 304 and the adsorbent layer below the drop pipe can be formed between the partition 304 and the multiple drop pipes 301. The flue gas through-holes 302 can be provided on the partition 304 and / or on the side wall of the drop pipe 301. The flue gas through-holes 302 on the partition 304 can allow the flue gas to directly enter the adsorbent layer above the flue gas mixing space 303. The flue gas through-holes 302 on the side wall of the drop pipe 301 can allow the flue gas to first enter the drop pipe 301 and then rise to the adsorbent layer above the partition 304.

[0089] In some embodiments, the cross-section of the drop tube 301 is circular, elliptical, or diamond-shaped. In some embodiments, the elliptical or diamond-shaped cross-section facilitates the passage of flue gas through the flue gas holes 302 on the sidewall of the drop tube 301 and is evenly distributed in the adsorbent within the interior of the drop tube 301 , thereby reducing the difference between the flue gas concentration within the interior of the drop tube 301 and the flue gas mixing space 303 , thereby further improving the uniformity of flue gas distribution within the adsorption bed 600 above the flue gas mixing space 303 .

[0090] As shown in Figures 5 and 7, in some embodiments, the partition component 300 includes a plurality of drop pipes 301, the drop pipes 301 are inverted conical drop hoppers, the inner cavity of the drop pipes 301 forms an adsorbent flow channel, the outer circumferences of the upper ends of the drop pipes 301 are connected to each other to prevent the flue gas in the flue gas mixing space 303 from flowing through the outer circumferences of the upper ends of the drop pipes 301 to the adsorption bed 600 above the flue gas mixing space 303, the lower ends of the drop pipes 301 are spaced apart from each other to form a flue gas mixing space 303, and the flue gas through-holes 302 are provided on the side wall of the drop pipes 301 so that the flue gas in the flue gas mixing space 303 flows into the drop pipes 301 through the flue gas through-holes 302 and flows through the inner cavity of the drop pipes 301 to the adsorption bed 600 above the partition 304.

[0091] In the embodiment of the present disclosure, an inverted conical drop hopper is provided so that the outer peripheries of the upper ends of the drop pipes 301 are connected to each other to prevent the adsorbent from flowing from the outside of the drop pipes 301, and the lower ends of the drop pipes 301 are spaced apart from each other to form a flue gas mixing space 303. The flue gas flows into the drop pipe 301 through the flue gas through-holes 302 on the side walls of the drop pipe 301, and then rises to the adsorbent material layer above the partition 304.

[0092] In some embodiments, the flow-disturbing component 400 includes a driver 403, an air extraction pipe 401, and an air supply pipe 402 in communication with the smoke mixing space 303. The driver 403 is disposed between the air extraction pipe 401 and the air supply pipe 402 and is configured to drive the smoke in the smoke mixing space 303 to flow out of the air extraction pipe 401 and into the smoke mixing space 303 from the air supply pipe 402, thereby forcibly disturbing the smoke in the smoke mixing space 303. In the embodiment of the present disclosure, the driver 403 is provided to forcibly mix the smoke in the smoke mixing space 303, thereby further making the smoke distribution in the smoke mixing space 303 more uniform.

[0093] In some embodiments, the driver 403 is a fan, which can be arranged on the side wall outside the adsorption tower, and the exhaust pipe 401 and the air supply pipe 402 are arranged at different positions of the flue gas mixing space 303. For example, the exhaust pipe 401 is arranged in an area with relatively high flue gas concentration, and the air supply pipe 402 is arranged in an area with relatively low flue gas concentration to adjust and balance the flue gas concentration in different areas of the flue gas mixing space 303, or by arranging multiple air supply pipes 402, the airflow of multiple air supply pipes 402 can drive the flue gas in the flue gas mixing space 303 to flow in a spiral to speed up the flue gas mixing speed in the flue gas mixing space 303. The exhaust pipe 401 can be arranged at the center of the spiral or in an area with a dead corner of air flow.

[0094] As shown in FIG5 , in some embodiments, a cooling module 404 is provided on the exhaust pipe 401 and / or the air supply pipe 402 , and the cooling module 404 is used to cool the flue gas flowing through the exhaust pipe 401 and / or the air supply pipe 402 to further improve the purification effect of the adsorbent on the flue gas.

[0095] The embodiment of the present disclosure cools the flue gas in the exhaust pipe 401 and / or the air supply pipe 402 by setting a cooling module 404 to further improve the purification effect of the adsorbent on the flue gas. Since the adsorption performance of the adsorbent can be increased exponentially in a low temperature environment, after the flue gas is cooled, the purification and adsorption effect of the flue gas can be greatly improved.

[0096] In some embodiments, the flue gas passing through the exhaust pipe 401 and / or the air supply pipe 402 can be cooled to below room temperature by the cooling module 404. In some embodiments, the flue gas passing through the exhaust pipe 401 and / or the air supply pipe 402 is cooled to below zero degrees Celsius. In some embodiments, the flue gas passing through the exhaust pipe 401 and / or the air supply pipe 402 is cooled to -20°C to -10°C.

[0097] In some embodiments, the cooling module 404 is a heat exchanger. For example, the cooling module 404 uses a fin-tube heat exchanger or a plate heat exchanger.

[0098] In some embodiments, the low-temperature flue gas adsorption tower with flue gas diversion function also includes an air distribution component 500. The air distribution component 500 is arranged in the tower body 100 and is located at the lower part of the adsorption bed 600. It is used to evenly distribute the flue gas entering the tower body 100 through the flue gas inlet 103, so that the flue gas entering the adsorption bed 600 is uniform on the same horizontal plane, further improving the adsorption effect and the consistency of the adsorption saturation of the adsorbent.

[0099] The air distribution component 500 can be an air distribution pipe. For example, a plurality of interconnected and concentric annular air distribution pipes are set up, and air distribution holes are opened on the air distribution pipes. The air distribution pipes are connected to the flue gas inlet 103. The flue gas entering the air distribution pipes is evenly dispersed in the tower body 100, so that the flue gas distribution on the same cross section is relatively uniform.

[0100] As shown in Figure 5, in some embodiments, a plurality of mixing components are provided in the tower body, and the plurality of mixing components are arranged in the adsorption bed along vertical intervals. The mixing component located at the bottom serves as the air distribution component 500, and the flue gas in the flue gas mixing space 303 is forcibly disturbed to ensure that the flue gas in the flue gas mixing space 303 in the air distribution component 500 is evenly distributed on the same horizontal plane.

[0101] When a mixing assembly is used as the air distribution assembly 500, the adsorbent stacking thickness below the air distribution assembly 500 is 50 mm-150 mm. Specifically, the adsorbent stacking thickness is 50 mm, 65 mm, 79 mm, 111 mm, 138 mm or 150 mm.

[0102] When the adsorbent accumulation thickness below the partition component 300 in the air distribution assembly 500 is less than 50 mm, the flue gas flow direction of the flue gas inlet 103 is likely to disturb the flue gas in the flue gas mixing space 303, making it difficult to achieve sufficient mixing of the flue gas in the flue gas mixing space 303.

[0103] When the adsorbent accumulation thickness under the partition component 300 of the air distribution assembly 500 is greater than 150 mm, it is easy to cause the adsorbent accumulation thickness under the partition component 300 to be too thick, resulting in an excessive proportion of the adsorbent layer with uneven airflow distribution. On the premise of ensuring that the flue gas is fully adsorbed and purified, the overall thickness of the adsorption bed 600 will be increased, thereby increasing the size of the adsorption tower.

[0104] In some embodiments, a cooling module 404 is disposed within the air distribution assembly 500 to cool the flue gas in the exhaust pipe 401 and / or the air supply pipe 402 within the air distribution assembly 500. In some embodiments, the flue gas temperature is cooled to -20°C to -10°C. If two mixing assemblies are provided within the adsorption bed 600, the flue gas in the exhaust pipe 401 and / or the air supply pipe 402 of the mixing assembly serving as the air distribution assembly 500 can be cooled to -10°C to -5°C, while the flue gas in the exhaust pipe 401 and / or the air supply pipe 402 of the other mixing assembly can be cooled to -20°C to -10°C.

[0105] As mentioned above, the inventors have discovered through research that lower flue gas temperatures are more beneficial for adsorption purification. However, excessively low flue gas temperatures complicate the structure of flue gas cooling equipment and increase energy consumption. For example, insulation layers are required for the cooling equipment, adsorption towers, and pipelines, requiring high sealing performance, which increases costs. Furthermore, excessively low temperatures can easily lead to condensation in the adsorption tower, causing the adsorbent to stick and clog, thus affecting adsorption. Therefore, cooling the flue gas to a temperature of -20°C to -10°C is beneficial.

[0106] The low-temperature flue gas adsorption system of the embodiment of the present disclosure includes a cooling tower, an adsorption tower and a regeneration tower. The cooling tower is used to cool the flue gas to low-temperature flue gas below room temperature. The adsorption tower is a low-temperature flue gas adsorption tower with a flue gas diversion function according to the above embodiment. The low-temperature flue gas enters the adsorption tower from the flue gas inlet 103 to contact with the adsorbent in the adsorption tower and is adsorbed and purified into clean flue gas and discharged from the flue gas outlet 104. 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.

[0107] In the low-temperature flue gas adsorption system of the disclosed embodiment, the flue gas and the adsorbent come into contact in a low-temperature environment to improve the adsorption effect of the adsorbent on pollutants in the flue gas. Moreover, the flue gas and the adsorbent are evenly separated, the adsorption effect is good, the adsorption saturation of the adsorbent is uniform, and the utilization rate of the adsorbent is improved. The adsorbent can be regenerated through the regeneration tower, so that the adsorbent can be continuously recycled, thereby improving efficiency.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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. A low-temperature flue gas adsorption tower with flue gas diversion function, characterized in that: include: A tower body, wherein an adsorption bed is arranged in the tower body, and the tower body has a feeding port, a discharging port, a flue gas inlet and a flue gas outlet. Adsorbent is input into the tower body through the feeding port and is accumulated in the tower body to form the adsorption bed. Low-temperature flue gas below room temperature is input into the tower body through the flue gas inlet and is contacted with the adsorbent in the adsorption bed to be adsorbed and purified into clean flue gas and discharged from the flue gas outlet. A flow guide component, the flow guide component comprises a plurality of guide plates, the plurality of guide plates are arranged in the tower body at intervals to separate at least a portion of the adsorption bed into a plurality of flow guide channels for guiding the flue gas and the adsorbent, the flue gas and the adsorbent flow in opposite directions in the flow guide channels; A mixing assembly, the mixing assembly comprising a barrier component and a spoiler component; The partition member is arranged in the tower body to form a flue gas mixing space in the adsorption bed, and the partition member has an adsorbent flow channel and a plurality of flue gas through holes, wherein the adsorbent flow channel is used for allowing the adsorbent to flow from above the flue gas mixing space through the flue gas mixing space to below the flue gas mixing space, wherein the flue gas entering the flue gas mixing space from below the flue gas mixing space directly flows into the adsorption bed above the flue gas mixing space through the flue gas through holes, and / or enters the adsorbent flow channel through the flue gas through holes to flow into the adsorption bed above the flue gas mixing space through the adsorbent flow channel; The flow disturbance component is in communication with the smoke mixing space and is used to disturb the smoke in the smoke mixing space so that the smoke in the smoke mixing space is evenly mixed. The spoiler component comprises: An air extraction pipe and an air supply pipe connected to the smoke mixing space; A driver is arranged between the exhaust pipe and the air supply pipe, and is used to drive the smoke in the smoke mixing space to flow out of the exhaust pipe and flow into the smoke mixing space from the air supply pipe to forcibly disturb and mix the smoke in the smoke mixing space.

2. The low-temperature flue gas adsorption tower with flue gas diversion function according to claim 1 is characterized in that: The plurality of guide plates are divided into a plurality of layers of guide plate units, each layer of the guide plate units includes a plurality of guide plates spaced apart from each other and arranged in parallel, and the plurality of layers of the guide plate units are spaced apart from each other in a vertical direction.

3. The low-temperature flue gas adsorption tower with flue gas diversion function according to claim 2 is characterized in that: In the longitudinal section of the tower body, the angle between the guide plate and the vertical direction is 0°-40°, and / or The arrangement directions of the guide plates in different guide plate units are parallel to each other or their projections in the same horizontal cross section of the tower body intersect with each other.

4. The low-temperature flue gas adsorption tower with flue gas diversion function according to claim 1 is characterized in that: The multiple guide plates are divided into a first group of guide plate units and a second group of guide plate units, the first group of guide plate units includes a plurality of first guide plates spaced apart from each other and arranged in parallel along a first direction, the second group of guide plate units includes a plurality of second guide plates spaced apart from each other and arranged in parallel along a second direction, the first direction and the second direction are both orthogonal to the vertical direction, the angle between the first direction and the second direction is 60°-90°, the first guide plate and the second guide plate intersect with each other so that the guide component in the cross section of the tower body is frame-shaped.

5. The low-temperature flue gas adsorption tower with flue gas diversion function according to claim 4 is characterized in that: The aperture of the smoke through hole is smaller than the particle size of the adsorbent so as to prevent the adsorbent from entering the smoke mixing space through the smoke through hole; and / or The partition component includes a partition and a plurality of drop pipes, the upper end of the drop pipe is connected to the partition, the inner cavity of the drop pipe forms the adsorbent flow channel, the plurality of drop pipes are arranged at intervals to form the smoke mixing space, and the smoke through holes are arranged on the partition and / or on the side walls of the drop pipes so that the smoke in the smoke mixing space flows through the smoke through holes to the adsorption bed above the partition; and / or The partition component includes a plurality of drop pipes, each of which is an inverted cone-shaped drop hopper. The inner cavity of the drop pipe forms the adsorbent flow channel. The outer circumferences of the upper ends of the drop pipes are connected to each other to prevent the smoke in the smoke mixing space from flowing through the outer circumferences of the upper ends of the drop pipes to the adsorption bed above the smoke mixing space. The lower ends of the drop pipes are spaced apart from each other to form the smoke mixing space. The smoke through-holes are provided on the side walls of the drop pipes so that the smoke in the smoke mixing space flows into the drop pipes through the smoke through-holes and flows through the inner cavity of the drop pipes to the adsorption bed above the partition.

6. The low-temperature flue gas adsorption tower with flue gas diversion function according to any one of claims 1 to 5, characterized in that: The exhaust pipe and / or the air supply pipe is provided with a cooling module, and the cooling module is used to cool the flue gas flowing through the exhaust pipe and / or the air supply pipe.

7. The low-temperature flue gas adsorption tower with flue gas diversion function according to any one of claims 1 to 6, characterized in that: It also includes an air distribution component, which is arranged in the tower body and located at the lower part of the adsorption bed, and is used for dispersing and evenly distributing the flue gas entering the tower body through the flue gas inlet.

8. A low-temperature flue gas adsorption system, characterized in that: include: A cooling tower, wherein the cooling tower is used to cool the flue gas to a low temperature flue gas below room temperature; An adsorption tower, wherein the adsorption tower is a low-temperature flue gas adsorption tower with a flue gas diversion function according to any one of claims 1 to 7, wherein the low-temperature flue gas enters the adsorption tower from the flue gas inlet to contact with the adsorbent in the adsorption tower and is adsorbed and purified into clean flue gas and discharged from the flue gas outlet; A 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.

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