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

Abstract

Disclosed are a low-temperature flue gas adsorption tower with a flue gas mixing function, and a low-temperature flue gas adsorption system. The low-temperature flue gas adsorption tower with a flue gas mixing function comprises a tower body, an adsorption layer, a spacer component and a flow-disturbing component, wherein the spacer component is arranged in the tower body to form a flue gas mixing space in the adsorption layer; the spacer component has adsorbent flow channels and a plurality of flue gas via holes, and a flue gas entering the flue gas mixing space flows into the adsorption layer above the flue gas mixing space via the flue gas via holes; and the flow-disturbing component is in communication with the flue gas mixing space and is configured to disturb the flue gas in the flue gas mixing space so that the flue gas in the flue gas mixing space can be uniformly mixed.

Description

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

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 2023115683698 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 mixing function. Background Art

[0004] Coal-fired flue gas contains a large amount of pollutants, which need to be purified before being discharged. In related technologies, an adsorption bed is usually arranged in an adsorption tower to adsorb pollutants in the flue gas. The flue gas enters the tower body through the flue gas inlet of the adsorption tower. The flue gas is purified after passing through the adsorption bed and is 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 large 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 flue gas emissions. However, the inventors have realized through research that compared with conventional high-temperature adsorption, the diffusion rate of low-temperature flue gas is low during low-temperature adsorption, 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 to evenly distribute the flue gas on the cross-section of the adsorption bed, 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 the adsorption saturation of the adsorbent is too different, resulting in a large amount of adsorbent used, wasting the adsorption capacity of the adsorbent, and increasing costs. Especially for low-temperature adsorption, the above problems are more obvious.

[0008] The present disclosure aims to address, at least to some extent, one of the technical problems in the related art. To this end, in a first aspect, an embodiment of the present disclosure proposes a low-temperature flue gas adsorption tower with a flue gas mixing function. The low-temperature flue gas adsorption tower can perform staged mixing of flue gas to improve the uniformity of flue gas distribution, thereby enhancing the flue gas adsorption and purification effect.

[0009] A second embodiment of the present disclosure provides a low-temperature flue gas adsorption system.

[0010] A low-temperature flue gas adsorption tower with a flue gas mixing function according to an embodiment of the first aspect of the present disclosure includes:

[0011] A tower body, the tower body having a flue gas inlet and a flue gas outlet, flue gas below room temperature is input into the tower body through the flue gas inlet, and clean flue gas purified by adsorption is discharged from the flue gas outlet;

[0012] An adsorption layer is provided in the tower body, the tower body having an adsorbent feed port and an adsorbent discharge port. The adsorption layer is formed by accumulating adsorbent input through the adsorbent feed port in the tower body. The flue gas input into the tower body is adsorbed and purified by the adsorption layer into clean flue gas.

[0013] a barrier component, the barrier component being arranged in the tower body to form a flue gas mixing space in the adsorption layer, the barrier component having an adsorbent flow channel and a plurality of flue gas through-holes, the adsorbent flow channel being 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 layer 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 layer above the flue gas mixing space through the adsorbent flow channel;

[0014] a flow-disturbing component, the flow-disturbing component being in communication with the smoke mixing space and being used for disturbing the smoke in the smoke mixing space so as to uniformly mix the smoke in the smoke mixing space;

[0015] The spoiler component includes:

[0016] an air extraction pipe and an air supply pipe connected to the smoke mixing space;

[0017] 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.

[0018] The low-temperature flue gas adsorption tower with flue gas mixing function of the disclosed embodiment improves the purification effect by performing low-temperature adsorption on flue gas under low-temperature conditions, and can achieve near-zero emissions. Moreover, by forming a flue gas mixing space in the adsorption layer, the low-temperature flue gas entering the flue gas mixing space is remixed under the action of the turbulent component, thereby improving the uniformity of the low-temperature flue gas distribution in the same horizontal plane, improving the flue gas adsorption and purification effect, and making the adsorption saturation of the adsorbent uniform, thereby improving the adsorption capacity and utilization rate of the adsorbent, reducing adsorbent consumption, and reducing costs. In particular, it is more advantageous for low-temperature adsorption.

[0019] The embodiment of the present disclosure further improves the smoke mixing effect in the smoke mixing space, improves the smoke uniformity, and further improves the adsorption effect and the utilization and consistency of the adsorption capacity of the adsorbent by setting a driver to force mixing of the smoke in the smoke mixing space.

[0020] 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.

[0021] 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. As a result, a flue gas mixing space can be reliably and stably formed in the adsorption layer, achieving staged mixing of the flue gas, reliably ensuring the uniformity of flue gas distribution and the uniformity of adsorption saturation of the adsorbent, and improving the purification effect.

[0022] In some embodiments, there are multiple partition components, and the multiple partition components are arranged in the tower body at intervals along the vertical direction.

[0023] By arranging multiple partition components, the embodiment of the present disclosure can form multiple flue gas mixing spaces in the adsorption layer. The flue gas can be mixed multiple times in the process of passing through the adsorption layer, further improving the uniformity of the distribution of the flue gas in the adsorption layer, making the adsorption saturation of the adsorbent in different areas more consistent, and further improving the adsorption purification effect of the flue gas and the utilization rate of the adsorbent adsorption capacity.

[0024] In some embodiments, among the plurality of said partition components, the adsorbent stacking thickness above the uppermost said partition component is 200 mm-400 mm, and the adsorbent stacking thickness below the lowermost said partition component is 50 mm-150 mm.

[0025] In the embodiment of the present disclosure, by limiting the position of the bottom and bottom partition components in the adsorption layer (i.e., the corresponding adsorbent layer thickness), the interference of the airflow disturbance at the flue gas inlet and the flue gas outlet on the flue gas in the adsorbent layer is reduced, and the low-temperature flue gas is promoted to be more evenly distributed, thereby ensuring the adsorption effect of the adsorbent and avoiding interference with the low-temperature flue gas.

[0026] In some embodiments, the partition component includes a partition and multiple drop tubes, the upper end of the drop tube is connected to the partition, the inner cavity of the drop tube forms the adsorbent flow channel, and the multiple drop tubes are arranged at intervals from each other to form the flue gas mixing space. 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 layer above the partition.

[0027] 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 as to better form a flue gas mixing space between the partition and the adsorbent layer accumulated 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. 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.

[0028] In some embodiments, the partition component includes a plurality of drop pipes, each of which is an inverted conical 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 adsorbent from flowing into the flue gas mixing space through the outer circumferences of the upper ends of the drop pipes. 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 into the adsorption layer above the partition component through the inner cavity of the drop pipes.

[0029] In the embodiment of the present disclosure, an inverted cone-shaped drop hopper is provided so that the outer peripheries of the upper ends of the drop tubes are connected to each other to prevent the adsorbent from flowing from the outside of the drop tubes, and the lower ends of the drop tubes are spaced apart from each other to form a flue gas mixing space. The flue gas flows into the drop tube through the flue gas holes on the side walls of the drop tubes, and then rises to the adsorbent material layer above the partition.

[0030] In some embodiments of the present disclosure, the number of the exhaust pipe and the air supply pipe is multiple, at least part of the exhaust pipe and / or at least part of the air supply pipe extends to the center of the smoke mixing space, and / or

[0031] The spoiler component further comprises a plurality of baffles, which are spaced apart from each other and arranged in parallel in the smoke mixing space, and / or

[0032] The spoiler component also includes a plurality of baffles, which are divided into a plurality of groups. The plurality of baffles in each group of baffles are spaced apart from each other, and at least part of the baffle groups are arranged at the exhaust port of the exhaust pipe and / or the air supply port of the air supply pipe to guide the flow direction of the flue gas in the corresponding area within the corresponding flue gas mixing space.

[0033] In the embodiments of the present disclosure, there can be multiple exhaust and supply pipes. By limiting the extraction and supply points of some of the exhaust and supply pipes based on the smoke flow characteristics within the smoke mixing space, the airflow mixing efficiency within the smoke mixing space can be improved. In some embodiments, the present disclosure can provide baffles to guide the smoke flow and direct the smoke from the exhaust and supply ports, promoting directional flow of smoke within a local area, thereby further improving the airflow mixing efficiency.

[0034] 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.

[0035] The embodiment of the present disclosure cools the flue gas in the exhaust pipe and / or the air supply pipe by providing a cooling module, thereby further reducing the flue gas temperature, thereby further improving the purification effect of the adsorbent on the flue gas.

[0036] The low-temperature flue gas adsorption system according to the second embodiment of the present disclosure includes:

[0037] A cooling tower, wherein the cooling tower is used to cool the flue gas to a low temperature flue gas below room temperature;

[0038] an adsorption tower, wherein the adsorption tower is a low-temperature flue gas adsorption tower with a flue gas mixing 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 and contacts the adsorbent in the adsorption tower to be adsorbed and purified into clean flue gas, which is discharged from the flue gas outlet;

[0039] 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.

[0040] The low-temperature flue gas adsorption system of the embodiment of the present disclosure cools the flue gas into low-temperature flue gas, allowing the flue gas to contact the adsorbent in a low-temperature environment for low-temperature adsorption, thereby improving the adsorption effect of the adsorbent on pollutants in the flue gas and achieving near-zero emissions of flue gas. The adsorbent is regenerated through a regeneration tower, allowing the adsorbent to be continuously recycled, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] FIG1 is a schematic structural diagram of a low-temperature flue gas adsorption tower with a flue gas mixing function according to an embodiment of the present disclosure.

[0042] FIG2 is a schematic structural diagram of a low-temperature flue gas adsorption tower with a flue gas mixing function according to another embodiment of the present disclosure.

[0043] FIG3 is a schematic structural diagram of a low-temperature flue gas adsorption tower with a flue gas mixing function according to another embodiment of the present disclosure.

[0044] FIG4 is a schematic structural diagram of a low-temperature flue gas adsorption tower with a flue gas mixing function according to another embodiment of the present disclosure.

[0045] FIG5 is a schematic structural diagram of an interlayer component according to an embodiment of the present disclosure.

[0046] FIG6 is a schematic structural diagram of an interlayer component according to another embodiment of the present disclosure.

[0047] FIG7 is a schematic structural diagram of a low-temperature flue gas adsorption tower with a flue gas mixing function according to another embodiment of the present disclosure.

[0048] FIG8 is a schematic structural diagram of the distribution of the air extraction pipe and the air supply pipe in an embodiment of the present disclosure.

[0049] FIG9 is a schematic structural diagram of an adsorbent unit in an embodiment of the present disclosure.

[0050] Reference numerals:

[0051] Tower body 1, flue gas inlet 11, flue gas outlet 12, adsorbent feed port 13, adsorbent discharge port 14;

[0052] Flue gas mixing space 21, adsorbent flow channel 22, flue gas through hole 23, drop pipe 24, partition 25;

[0053] The spoiler 3, the air extraction pipe 31, the air supply pipe 32, the driver 33, and the baffle 34;

[0054] Adsorption layer 4;

[0055] Cooling module 5;

[0056] Adsorbent 61 and breathable shell 62. DETAILED DESCRIPTION

[0057] 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.

[0058] The following describes a low-temperature flue gas adsorption tower with a flue gas mixing function according to an embodiment of the present disclosure with reference to Figures 1 to 8. The low-temperature flue gas adsorption tower with a flue gas mixing function includes a tower body 1, which has a flue gas inlet 11 and a flue gas outlet 12. Flue gas below room temperature is input into the tower body 1 from the lower end of the tower body 1 through the flue gas inlet 11, and the clean flue gas purified by adsorption is discharged from the upper end of the tower body 1 through the flue gas outlet 12.

[0059] An adsorption layer 4 is provided in the tower body 1. The tower body 1 has an adsorbent feed port 13 and an adsorbent discharge port 14. The adsorbent feed port 13 is provided at the top of the tower body 1, and the adsorbent discharge port 14 is provided at the bottom of the tower body 1. The adsorbent input through the adsorbent feed port 13 accumulates in the tower body 1 to form an adsorption layer 4. The adsorbent saturated with adsorption is discharged through the adsorbent discharge port 14. The flue gas input into the tower body 1 is purified into clean flue gas through the adsorption layer 4.

[0060] In order to make the flue gas entering the adsorption layer 4 evenly distributed on the same horizontal plane, a partition component is arranged in the tower body 1, and the partition component is placed in the adsorption layer 4. The partition component forms a flue gas mixing space 21 in the adsorption layer 4. The partition component has an adsorbent flow channel 22 and a plurality of flue gas through-holes 23. The adsorbent flow channel 22 is used for allowing the adsorbent to flow from above the flue gas mixing space 21 through the flue gas mixing space 21 to below the flue gas mixing space 21, wherein the flue gas entering the flue gas mixing space 21 from below the flue gas mixing space 21 directly flows through the flue gas through-holes 23 to the adsorption layer 4 above the flue gas mixing space 21, and / or enters the adsorbent flow channel 22 through the flue gas through-holes 23 to flow through the adsorbent flow channel 22 to the adsorption layer 4 above the flue gas mixing space 21.

[0061] In order to improve the mixing adequacy and mixing effect of the flue gas in the flue gas mixing space 21, the embodiment of the present disclosure is also provided with a spoiler component 3, which is connected to the flue gas mixing space 21 and is used to disturb the flue gas in the flue gas mixing space 21, so that the flue gas in the flue gas mixing space 21 is mixed more evenly. After entering the flue gas mixing space 21, the flue gas can rely on itself to diffuse and mix, and can also rely on the spoiler component 3 to mix, thereby improving the mixing effect.

[0062] The low-temperature flue gas adsorption tower with flue gas mixing function of the disclosed embodiments uses an adsorbent to perform low-temperature adsorption on low-temperature flue gas under low-temperature conditions, improving purification effectiveness and achieving near-zero emissions. In low-temperature environments, nitrogen oxides in the flue gas undergo low-temperature oxidation and adsorption on the surface of adsorbents such as activated carbon, oxidizing the difficult-to-adsorb nitric oxide gas into easily adsorbable nitrogen dioxide gas, resulting in a hundreds-fold increase in adsorption capacity. Furthermore, the adsorption capacity for components such as sulfur dioxide, carbon dioxide, and heavy metals also increases exponentially in low-temperature environments.

[0063] Moreover, by forming a flue gas mixing space 21 in the adsorption layer 4, the flue gas entering the flue gas mixing space 21 is mixed under the action of the turbulent component 3, thereby improving the uniformity of flue gas distribution on the same horizontal plane, improving the flue gas adsorption and purification effect, and making the adsorption saturation of the adsorbent uniform, thereby improving the utilization rate of the adsorbent adsorption capacity and adsorption capacity, reducing the adsorbent consumption, and reducing the cost.

[0064] In the embodiments of the present disclosure, the low temperature 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 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.

[0065] In some embodiments, the aperture of the smoke through hole 23 is smaller than the particle size of the adsorbent to prevent the adsorbent from entering the smoke mixing space 21 through the smoke through hole 23 .

[0066] In other words, the embodiment of the present disclosure can prevent the adsorbent from entering the flue gas mixing space 21 through the flue gas through-hole 23 by controlling the aperture of the flue gas through-hole 23, so that the adsorbent can only flow through the adsorbent flow channel 22, thereby forming the flue gas mixing space 21 more reliably and stably in the adsorption layer 4, so as to realize the staged mixing of the flue gas, reliably ensure the uniformity of the flue gas distribution and the uniformity of the adsorption saturation of the adsorbent, and improve the purification effect.

[0067] As shown in FIG9 , the adsorbent 61 in the embodiment of the present disclosure can be a granular or powdered adsorbent, or an adsorbent body made of powdered or granular adsorbent, such as a spherical body or a cylindrical body formed by a binder of the powdered or granular adsorbent 61. 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 61 can be filled in a breathable outer shell 62 to form an adsorbent unit, wherein the breathable outer shell has air holes, and the flue gas can enter the breathable outer shell 62 through the air holes. The flue gas can 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 reducing 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 can be 10mm-100mm, and the diameter of the adsorbent is 1mm-10mm.

[0068] When the adsorption layer 4 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 23 is smaller than the particle size of the adsorbent particles or adsorbent bodies. When the adsorption layer 4 is formed by stacking adsorbent units, the pore size of the flue gas through-hole 23 is smaller than the particle size of the adsorbent units.

[0069] As shown in FIG3 and FIG4 , in some embodiments, there may be multiple partition components, and the multiple partition components are arranged in the tower body 1 at intervals along the vertical direction.

[0070] Specifically, the number of the barrier components can be two, three or five, and the number of the barrier components can be determined according to the thickness of the adsorption layer 4 in the vertical direction and the height of the barrier components in the vertical direction.

[0071] In the embodiment of the present disclosure, by arranging multiple partition components, multiple flue gas mixing spaces 21 can be formed in the adsorption layer 4, so that the flue gas can be remixed multiple times in the process of passing through the adsorption layer 4, further improving the uniformity of the distribution of the flue gas in the adsorption layer 4, making the adsorption saturation of the adsorbent in different areas more consistent, further improving the adsorption purification effect of the flue gas, and making full use of the adsorption capacity and adsorption capacity of the adsorbent.

[0072] In some embodiments, among the multiple barrier components, the adsorbent stacking thickness above the uppermost barrier component is 200 mm-400 mm, and the adsorbent stacking thickness below the lowermost barrier component is 50 mm-150 mm.

[0073] In some embodiments, the adsorbent above the uppermost barrier member can prevent the airflow at the flue gas outlet 12 from interfering with the flue gas flow within the adsorbent layer, and the adsorbent below the lowermost barrier member can prevent the airflow at the flue gas inlet 11 from interfering with the flue gas flow within the adsorption layer 4. The adsorbent stacking thickness above the uppermost barrier member can be 200 mm, 240 mm, 275 mm, 320 mm, 387 mm, or 400 mm, and the adsorbent stacking thickness below the lowermost barrier member can be 50 mm, 65 mm, 79 mm, 111 mm, 138 mm, or 150 mm.

[0074] By piling a certain thickness of adsorbent above the top partition component and below the bottom partition component, the flue gas in the flue gas mixing space 21 formed between the top partition component and the bottom partition component can be evenly distributed, thereby ensuring that the flue gas in the adsorption layer 4 between the top partition component and the bottom partition component is evenly distributed on the same horizontal plane and that the airflow direction flows stably in the vertical direction or in a direction adjacent to the vertical direction.

[0075] The inventors have found that when the adsorbent stack thickness below the lowest interlayer component is less than 50 mm, the flue gas flow at the flue gas inlet 11 easily disturbs the flue gas flow in the flue gas mixing space 21, which is not conducive to the full mixing of the flue gas in the flue gas mixing space 21.

[0076] When the adsorbent accumulation thickness under the lowest partition component is greater than 150 mm, it is easy to cause the adsorbent accumulation thickness under the partition component 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 layer 4 will be increased, thereby increasing the size of the adsorption tower.

[0077] In the embodiment of the present disclosure, by limiting the positions of the bottom and bottom partition components in the adsorption layer 4 (i.e., corresponding to the thickness of the adsorbent layer), the interference of the airflow disturbance at the flue gas inlet and the flue gas outlet on the flue gas in the adsorbent layer is reduced, and the low-temperature flue gas is made more evenly distributed, which ensures the adsorption effect of the adsorbent and avoids interference with the low-temperature flue gas.

[0078] As shown in FIG. 5 , in some embodiments, the partition component includes a partition plate 25 and a plurality of drop tubes 24 , and the upper ends of the drop tubes 24 are connected to the partition plate 25 .

[0079] The inner cavity of the drop pipe 24 forms an adsorbent flow channel 22, and multiple drop pipes 24 are arranged at intervals to form a flue gas mixing space 21. The flue gas through holes 23 are provided on the partition 25 and / or on the side walls of the drop pipe 24 so that the flue gas in the flue gas mixing space 21 flows through the flue gas through holes 23 to the adsorption layer 4 above the partition 25.

[0080] In the embodiment of the present disclosure, a drop pipe 24 is provided to allow the adsorbent to flow downward through the inner cavity of the drop pipe 24, and a partition 25 is provided to prevent the adsorbent from flowing downward from the outside of the drop pipe 24, so that a flue gas mixing space 21 between the adsorbent layer above the partition and the adsorbent layer below the drop pipe can be more reliably formed between the partition 25 and the multiple drop pipes 24. The flue gas through-holes 23 can be provided on the partition 25 and / or on the side wall of the drop pipe 24. The flue gas through-holes 23 on the partition 25 can allow the flue gas to directly enter the adsorbent layer above the flue gas mixing space 21, and the flue gas through-holes 23 on the side wall of the drop pipe 24 can allow the flue gas to first enter the drop pipe 24 and then rise to the adsorbent layer above the partition 25.

[0081] In some embodiments, the cross-section of the drop tube 24 is circular, elliptical, or diamond-shaped. In some embodiments, the elliptical or diamond-shaped shape facilitates the passage of smoke through the smoke holes 23 on the sidewall of the drop tube 24 and is evenly distributed in the adsorbent within the inner cavity of the drop tube 24, thereby reducing the difference between the smoke concentration within the inner cavity of the drop tube 24 and the smoke concentration in the smoke mixing space 21, thereby further improving the uniformity of smoke distribution in the adsorption layer 4 above the smoke mixing space 21.

[0082] As shown in FIG. 6 , in some embodiments, the barrier component includes a plurality of drop tubes 24 , and the drop tubes 24 are inverted tapered drop hoppers.

[0083] The inner cavity of the drop tube 24 forms an adsorbent flow channel 22, and the outer circumferences of the upper ends of the drop tube 24 are connected to each other to prevent the adsorbent from flowing into the flue gas mixing space 21 through the outer circumferences of the upper ends of the drop tube 24. The lower ends of the drop tube 24 are spaced apart from each other to form the flue gas mixing space 21. The flue gas through-holes 23 are provided on the side walls of the drop tube 24 so that the flue gas in the flue gas mixing space 21 flows into the drop tube 24 through the flue gas through-holes 23 and flows through the inner cavity of the drop tube 24 to the adsorption layer 4 above the partition component.

[0084] Specifically, 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 24 are connected to each other to prevent the adsorbent from flowing from the outside of the drop pipes 24, and the lower ends of the drop pipes 24 are spaced apart from each other to form a flue gas mixing space 21. The flue gas flows into the drop pipe 24 through the flue gas through-holes 23 on the side walls of the drop pipe 24, and then rises to the adsorbent material layer above the partition 25.

[0085] As shown in Figures 1 to 8, in some embodiments, the flow-disturbing component 3 includes a driver 33, and an exhaust pipe 31 and an air supply pipe 32 that are in communication with the smoke mixing space 21. The driver 33 is disposed between the exhaust pipe 31 and the air supply pipe 32, and is used to drive the smoke in the smoke mixing space 21 to flow out of the exhaust pipe 31 and into the smoke mixing space 21 from the air supply pipe 32, thereby forcibly disturbing the smoke in the smoke mixing space 21. In the embodiment of the present disclosure, by providing the driver 33 to forcibly mix the smoke in the smoke mixing space 21, the smoke mixing effect in the smoke mixing space 21 is further improved, the smoke uniformity is improved, and the adsorption effect and the utilization rate and consistency of the adsorption capacity of the adsorbent are further improved.

[0086] In some embodiments, the driver 33 is a fan, which can be arranged on the side wall outside the adsorption tower, and the exhaust pipe 31 and the air supply pipe 32 are arranged at different positions of the flue gas mixing space 21. For example, the exhaust pipe 31 is arranged in an area with relatively high flue gas concentration, and the air supply pipe 32 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 21, or by arranging multiple air supply pipes 32, the airflow of multiple air supply pipes 32 can drive the flue gas in the flue gas mixing space 21 to flow in a spiral to speed up the flue gas mixing speed in the flue gas mixing space 21. The exhaust pipe 31 can be arranged at the center of the spiral or in an area with a dead corner of air flow.

[0087] As shown in Figures 1 to 8, in some embodiments, the number of exhaust pipes 31 and air supply pipes 32 can be multiple, and at least part of the exhaust pipes 31 and / or at least part of the air supply pipes 32 extend to the center of the smoke mixing space 21. By arranging the positions of the exhaust ports and air supply ports of the exhaust pipes 31 and the air supply pipes 32, it is ensured that the smoke in the smoke mixing space 21 can be fully mixed, thereby enhancing the smoke flow in the smoke mixing space 21.

[0088] In some embodiments, the cross-section of the adsorption tower is rectangular, and the cross-section of the flue gas mixing space 21 formed is also rectangular. Dead corners of airflow are easily formed at the end corners of the flue gas mixing space 21, which will lead to a low flue gas flow rate. Therefore, the suction ports of the four exhaust pipes 31 are respectively arranged at the four end corners of the flue gas mixing space 21, and the air supply ports of the multiple air supply pipes 32 are arranged in the middle of the flue gas mixing space 21, and the air supply ports of the multiple air supply pipes 32 can drive the airflow in the flue gas mixing space 21 to spirally flow, thereby improving the flue gas mixing effect in the rectangular flue gas mixing space 21 and making it more uniform.

[0089] The number of the exhaust pipes 31 and the air supply pipes 32 in the embodiment of the present disclosure can be multiple, and according to the smoke flow characteristics in the smoke mixing space 21, the extraction points of some of the exhaust pipes 31 and the air supply pipes 32 are set in a targeted manner, which can further improve the airflow mixing effect in the smoke mixing space 21.

[0090] In some embodiments, the spoiler component 3 further includes a plurality of baffles 34 , which are spaced apart from each other and arranged in parallel in the smoke mixing space 21 .

[0091] As shown in FIG7 , the baffles 34 can guide the airflow so that the smoke flows along the gap between two adjacent baffles 34 , and cooperate with the forced disturbance of the driver 33 to improve the smoke mixing effect in the smoke mixing space 21 .

[0092] In some embodiments, the spoiler component 3 further includes a plurality of baffles 34 , which are divided into a plurality of groups, and the baffles 34 in each group of baffles 34 are spaced apart from each other.

[0093] As shown in FIG8 , at least some of the baffle groups are arranged at the air extraction port of the air extraction pipe 31 and / or the air delivery port of the air delivery pipe 32 to guide the direction of the flue gas flow in corresponding areas within the corresponding flue gas mixing space 21. In the disclosed embodiment, the baffles 34 are provided to guide the flue gas at the air extraction port and the air delivery port, promoting directional flow of the flue gas within a local area and further improving the airflow mixing effect.

[0094] Figure 8 shows that four groups of baffles 34 are respectively arranged at the exhaust ports of the exhaust pipes of the four spoiler components to avoid large disturbances in local areas during exhaust and low air flow efficiency in other areas. At the same time, the four groups of baffles 34 are located at the end corners of the tower body to avoid the formation of airflow dead corners at the end corners and improve the flue gas flow effect in the flue gas mixing space.

[0095] In some embodiments, the multiple baffles 34 in each set of baffles 34 may be spaced apart from each other and arranged in parallel.

[0096] In some embodiments, the multiple baffles 34 in each group of baffles 34 are distributed in a fan shape, that is, the multiple baffles 34 are spaced apart from each other, but the spacing distance between two adjacent baffles 34 close to the exhaust port or the air supply port is smaller than the spacing distance away from the exhaust port or the air supply port to form a fan shape.

[0097] In some embodiments, the lengths of the multiple baffles 34 in each set of baffles 34 may be different, thereby better and more targetedly guiding the airflow in a local area and improving the airflow mixing effect in the entire smoke mixing space 21. For example, in a set of baffles 34, the baffles located at the edges are relatively short, while the baffles located in the middle are relatively long. The longer baffles can be used to extend the exhaust or supply airflow to a location farther from the corresponding exhaust port or supply port.

[0098] As shown in FIG. 1 to FIG. 8 , in some embodiments, a cooling module 5 is provided on the exhaust pipe 31 and / or the air supply pipe 32 , and the cooling module 5 is used to cool the flue gas flowing through the exhaust pipe 31 and / or the air supply pipe 32 .

[0099] In the embodiment of the present disclosure, by setting up a cooling module 5 to cool the flue gas in the exhaust pipe 31 and / or the air supply pipe 32, the low-temperature adsorption purification effect of the adsorbent on the flue gas can be further improved. Since the adsorption performance of the adsorbent can be increased exponentially in a low-temperature environment, when multiple interlayer components are set up, the flue gas purification and adsorption effect is greatly improved by cooling the flue gas multiple times.

[0100] In some embodiments, the flue gas passing through the exhaust pipe 31 and / or the air supply pipe 32 can be cooled to below room temperature by the cooling module 5. In some embodiments, the flue gas passing through the exhaust pipe 31 and / or the air supply pipe 32 is cooled to below zero degrees Celsius. In some embodiments, the flue gas passing through the exhaust pipe 31 and / or the air supply pipe 32 is cooled to -20°C to -10°C.

[0101] In some embodiments, when multiple partition components are arranged, the flue gas in the flue gas mixing space 21 corresponding to different partition components can be cooled to different temperatures. Along the flow direction of the flue gas, the flue gas temperature in the flue gas mixing space 21 in multiple partition components can gradually decrease. For example, three partition components are arranged in the adsorption tower, and along the flow direction of the flue gas, the flue gas temperatures in the three flue gas mixing spaces 21 formed are 0~10℃, -10℃~-5℃, and -20℃~-10℃, respectively.

[0102] Through research, the inventors discovered that lower flue gas temperatures are more beneficial for adsorption purification. However, excessively low flue gas temperatures complicate the cooling equipment and increase energy consumption. For example, insulation is required for the cooling equipment, adsorption tower, and pipelines, requiring high sealing requirements, 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 between -20°C and -10°C is beneficial.

[0103] In some embodiments, the cooling module 5 is a heat exchanger, for example, the cooling module 5 is a fin-tube heat exchanger or a plate heat exchanger.

[0104] The following describes a low-temperature flue gas adsorption system according to an embodiment of the present disclosure. The low-temperature flue gas adsorption system according to an 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 mixing function according to the above-mentioned embodiment. The low-temperature flue gas enters the adsorption tower from the flue gas inlet 11 and contacts the adsorbent in the adsorption tower to be adsorbed and purified into clean flue gas, which is discharged from the flue gas outlet 12. 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.

[0105] The low-temperature flue gas adsorption system of the disclosed embodiment not only allows the flue gas to contact the adsorbent in a low-temperature environment, thereby improving the adsorption effect of the adsorbent on pollutants in the flue gas, but also regenerates the adsorbent through a regeneration tower, allowing the adsorbent to be continuously recycled, thereby reducing costs and improving efficiency.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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 mixing function, characterized in that: include: A tower body, wherein the tower body has a smoke inlet and a smoke outlet, smoke below room temperature is input into the tower body through the smoke inlet, and clean smoke purified by adsorption is discharged from the smoke outlet; An adsorption layer, wherein the adsorption layer is arranged in the tower body, the tower body has an adsorbent feed port and an adsorbent discharge port, the adsorption layer is formed by the adsorbent input through the adsorbent feed port and accumulated in the tower body, and the flue gas input into the tower body is adsorbed and purified by the adsorption layer to become clean flue gas; a barrier component, wherein the barrier component is arranged in the tower body to form a flue gas mixing space in the adsorption layer, the barrier component having an adsorbent flow channel and a plurality of flue gas through holes, the adsorbent flow channel being 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 layer 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 layer above the flue gas mixing space through the adsorbent flow channel; a spoiler component, the spoiler component being in communication with the smoke mixing space and being used for disturbing 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 mixing function according to claim 1 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.

3. The low-temperature flue gas adsorption tower with flue gas mixing function according to claim 1 or 2, characterized in that: There are multiple partition components, and the multiple partition components are arranged in the tower body at intervals along the vertical direction.

4. The low-temperature flue gas adsorption tower with flue gas mixing function according to claim 3 is characterized in that: Among the plurality of partition components, the adsorbent accumulation thickness above the top partition component is 200mm-400mm, and the adsorbent accumulation thickness below the bottom partition component is 50mm-150mm.

5. The low-temperature flue gas adsorption tower with flue gas mixing function according to any one of claims 1 to 4, characterized in that: The partition component includes a partition and a plurality of drop tubes, the upper end of the drop tube is connected to the partition, the inner cavity of the drop tube forms the adsorbent flow channel, the plurality of drop tubes are arranged at intervals from each other to form the smoke mixing space, and the smoke through-holes are provided on the partition and / or on the side walls of the drop tubes so that the smoke in the smoke mixing space flows through the smoke through-holes to the adsorption layer above the partition.

6. The low-temperature flue gas adsorption tower with flue gas mixing function according to any one of claims 1 to 4, characterized in that: The barrier component includes a plurality of drop tubes, each of which is an inverted cone-shaped drop hopper. The inner cavity of the drop tube forms the adsorbent flow channel. The outer circumferences of the upper ends of the drop tubes are connected to each other to prevent the adsorbent from flowing into the smoke mixing space through the outer circumferences of the upper ends of the drop tubes. The lower ends of the drop tubes 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 tubes so that the smoke in the smoke mixing space flows into the drop tubes through the smoke through holes and flows into the adsorption layer above the barrier component through the inner cavity of the drop tubes.

7. The low-temperature flue gas adsorption tower with flue gas mixing function according to any one of claims 1 to 6, characterized in that: The number of the exhaust pipes and the air supply pipes are both multiple, at least part of the exhaust pipes and / or at least part of the air supply pipes extend to the central part of the smoke mixing space, and / or The spoiler component further comprises a plurality of baffles, which are spaced apart from each other and arranged in parallel in the smoke mixing space, and / or The spoiler component also includes a plurality of baffles, which are divided into a plurality of groups. The plurality of baffles in each group of baffles are spaced apart from each other, and at least part of the baffle groups are arranged at the exhaust port of the exhaust pipe and / or the air supply port of the air supply pipe to guide the flow direction of the smoke in the corresponding area within the corresponding smoke mixing space.

8. The low-temperature flue gas adsorption tower with flue gas mixing function according to any one of claims 1 to 7, 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.

9. 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 mixing function according to any one of claims 1 to 8, wherein the low-temperature flue gas enters the adsorption tower from the flue gas inlet and contacts the adsorbent in the adsorption tower to be adsorbed and purified into clean flue gas and is 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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