Regeneration tower with uniform material distribution and low-temperature adsorption regeneration system

Abstract

The invention relates to the technical field of adsorption purification and discloses a uniform-distribution regeneration tower which comprises a tower body and a distribution pipe, the tower body is provided with an adsorbent inlet and an adsorbent outlet, an inner cavity of the tower body comprises a distribution cavity, a discharging cavity and a regeneration cavity, and the distribution pipe is provided with a feeding end and a discharging end. The discharging end of the material distributing pipe extends into the material distributing cavity from the adsorbent inlet and is used for distributing the adsorbent into the material distributing cavity, and the material distributing pipe can rotate relative to the tower body so as to change the material distributing position of the discharging end in the material distributing cavity. According to the regeneration tower disclosed by the embodiment of the invention, the material distribution pipe can discharge materials while rotating relative to the tower body, so that an adsorbent is uniformly distributed in the material distribution cavity, and the adsorbent can be prevented from being accumulated at a local position of the material distribution cavity, so that blockage caused by accumulation of the adsorbent at the local position is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of adsorption purification, and in particular to a regeneration tower with uniform distribution and a low-temperature adsorption regeneration system. Background Art

[0002] In the related technology, the high-temperature flue gas generated by the boiler is generally around 200°C, and the flue gas contains a large amount of sulfide and nitrogen oxides. The flue gas needs to be desulfurized and denitrated before it can be discharged into the atmosphere. At present, high-temperature flue gas is generally desulfurized and denitrated by an adsorption tower to achieve the purpose of flue gas purification. However, since the adsorption efficiency of the adsorbent is negatively correlated with the temperature, when the adsorbent in the adsorption tower adsorbs the high-temperature flue gas, it will lead to low adsorption efficiency, high adsorbent consumption, poor adsorption effect, and high nitrogen oxide content in the clean flue gas after adsorption, resulting in high sulfide and nitrogen oxide content in the purified flue gas. Summary of the invention

[0003] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0004] In order to overcome the problems of high-temperature adsorption, the flue gas low-temperature adsorption technology is proposed in the relevant technology, that is, firstly cool the high-temperature flue gas to low-temperature flue gas below zero degrees in a spray cooling tower, and then input the low-temperature flue gas into the adsorption tower for low-temperature adsorption. The adsorbent saturated with adsorption is sent to the regeneration tower with high regeneration efficiency for heating desorption regeneration, and the regenerated adsorbent is sent back to the adsorption tower for recycling. 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.

[0005] In the related art, the top of the regeneration tower with high regeneration efficiency is provided with an adsorbent inlet, a distribution pipe is arranged outside the inner cavity of the regeneration tower with high regeneration efficiency, and the discharge end of the distribution pipe is connected with the adsorbent inlet. When the adsorbent enters the regeneration tower with high regeneration efficiency, a distribution layer is formed, and the distribution layer is easy to be partially accumulated in the regeneration tower with high regeneration efficiency in a conical shape. Since there is a certain interaction force between the accumulated adsorbents, the discharge speed of the adsorbent in the discharge pipe will be greatly reduced, and even the discharge pipe will be blocked, resulting in a reduction in the regeneration efficiency of the adsorbent.

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present invention provides a regeneration tower with uniform material distribution and high adsorbent regeneration efficiency.

[0007] The invention provides a low-temperature adsorption regeneration system with uniform material distribution and high adsorbent regeneration efficiency.

[0008] The regeneration tower of the present invention comprises a tower body and a distribution pipe, wherein the tower body has an adsorbent inlet and an adsorbent outlet, and the inner cavity of the tower body comprises a distribution cavity located at the top of the inner cavity and connected to the adsorbent inlet, a lower cavity located at the bottom of the inner cavity and connected to the adsorbent outlet, and a regeneration cavity located between the distribution cavity and the lower cavity;

[0009] The distribution pipe has a feed end and a discharge end. The discharge end of the distribution pipe extends from the adsorbent inlet into the distribution cavity for distributing the adsorbent into the distribution cavity. The distribution pipe is rotatable relative to the tower body to change the distribution position of the discharge end in the distribution cavity.

[0010] During the adsorbent regeneration process of the regeneration tower of the present invention, since the distribution tube can rotate relative to the tower body to change the distribution position of the discharge end in the distribution chamber, the distribution tube can be rotated relative to the tower body while discharging, so that the adsorbent is distributed more evenly in the distribution chamber, which can effectively avoid the problem of greater interaction force between adsorbents due to the accumulation of more adsorbents in the distribution layer. The adsorbent can be discharged at a normal speed, avoiding the problem of blockage caused by accumulation of adsorbents at local positions, thereby increasing the discharge speed of the adsorbent and improving the regeneration efficiency of the adsorbent.

[0011] Optionally, the regeneration tower with uniform material distribution of the present invention further comprises a feeding hopper, the feeding end of the distribution pipe is rotatably connected to the feeding hopper, the distribution pipe is inserted on a rolling bearing and extends into the feeding hopper, so that the adsorbent in the feeding hopper can enter the distribution pipe while the distribution pipe can rotate relative to the feeding hopper. The regeneration tower of the present invention facilitates feeding into the distribution pipe by rotatably connecting the feeding end of the distribution pipe to the feeding hopper.

[0012] Optionally, there are multiple distribution pipes, and the discharge ends of the multiple distribution pipes are spaced apart in the distribution cavity, which is further conducive to evenly distributing the adsorbent in the distribution cavity, so as to avoid local accumulation of the adsorbent in the distribution cavity, thereby further facilitating the discharge speed of the adsorbent and improving the regeneration efficiency of the adsorbent.

[0013] Optionally, the material discharging end of the material distributing pipe has a plurality of material distributing openings, and the plurality of material distributing openings are distributed along the circumference and / or radial direction of the tower body. That is to say, the plurality of material distributing openings can be distributed along the circumference of the tower body, or along the radial direction of the tower body, or a part of the material distributing openings can be distributed along the circumference of the tower body, and another part of the material distributing openings can be distributed along the radial direction of the tower body, so that the plurality of material distributing openings are distributed in the circumference and radial direction of the tower body, making the arrangement of the material distributing openings convenient.

[0014] Optionally, the discharge ends of the multiple distribution pipes are located in the same horizontal plane, so that the adsorbent flowing out of the discharge end of each distribution pipe can fall into the distribution cavity at the same time, so as to avoid the distribution layer formed in the distribution cavity having an irregular shape due to the height difference of the discharge ends of the distribution pipes in the vertical direction, which is not conducive to the discharge of the adsorbent.

[0015] Optionally, the discharge ends of the plurality of distribution pipes are distributed along the circumference of the tower body and the radial direction of the tower body. When the adsorbent enters the distribution cavity from the discharge ends of the distribution pipes, the adsorbent is distributed in the distribution cavity in the circumferential and radial directions of the tower body, so that the adsorbent is distributed more evenly in the distribution cavity to avoid difficulty in discharging the adsorbent due to local accumulation in the distribution cavity, which is beneficial to improving the discharging speed of the adsorbent, and further beneficial to improving the regeneration efficiency of the adsorbent.

[0016] Optionally, the discharge ends of the plurality of distribution pipes are evenly arranged within the cross-section of the inner cavity of the tower body, further making the adsorbent more evenly distributed in the distribution cavity, so as to avoid difficulties in discharging the adsorbent due to local accumulation in the distribution cavity, further facilitating the increase in the discharging speed of the adsorbent, and further facilitating the increase in the regeneration efficiency of the adsorbent.

[0017] Optionally, the distribution pipe is provided with a first control valve, which is used to control the discharge flow rate of the adsorbent in the distribution pipe. The discharge speed and discharge amount of each distribution pipe are controlled by adjusting the opening of the first control valve to avoid blockage caused by excessive adsorbent in a certain area of ​​the distribution cavity, making the discharge adjustment of the distribution pipe convenient.

[0018] Optionally, the inner cavity of the tower body further comprises a buffer cavity and a cooling cavity located between the regeneration cavity and the material discharging cavity, the buffer cavity is located between the regeneration cavity and the cooling cavity, a plurality of first material discharging pipes spaced apart are arranged in the regeneration cavity, a feed end of the first material discharging pipe is communicated with the material distributing cavity, and a discharge end of the first material discharging pipe is communicated with the buffer cavity;

[0019] A plurality of spaced-apart second feed pipes are arranged in the cooling cavity, a feed end of the second feed pipe is communicated with the buffer cavity, and a discharge end of the second feed pipe is communicated with the feed cavity.

[0020] The regeneration tower of the present invention is provided with a buffer chamber between the regeneration chamber and the cooling chamber, and the adsorbent flowing out of the regeneration chamber can play a buffering role in the buffer chamber, so that the adsorbent can smoothly flow downward into the cooling chamber. In addition, due to the different temperatures between the regeneration chamber and the cooling chamber, the regeneration chamber requires a heat exchange medium with a higher temperature for adsorbent desorption and regeneration, and the cooling chamber requires a heat exchange medium with a lower temperature for adsorbent cooling. The adsorbent in the buffer chamber can isolate the regeneration chamber from the cooling chamber, prevent the temperatures between the regeneration chamber and the cooling chamber from affecting each other, and help improve the working reliability of the regeneration chamber and the cooling chamber.

[0021] The low-temperature adsorption regeneration system of the present invention comprises a regeneration tower, an adsorption tower and a spray cooling tower, wherein the regeneration tower is the regeneration tower summarized in any one of the above embodiments; the adsorbent discharged from the discharge port of the adsorption tower is transported to the feed end of the distribution pipe of the regeneration tower; the spray cooling tower is connected to the adsorption tower, and is used to cool the flue gas to below zero degrees and then transport it to the adsorption tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the regeneration tower of the embodiment of the present invention.

[0023] Figure 2 1 is a top view of a regeneration tower according to an embodiment of the present invention.

[0024] Figure 3 1 is a top view of a regeneration tower according to another embodiment of the present invention.

[0025] Figure 4 1 is a top view of a regeneration tower according to another embodiment of the present invention.

[0026] Figure 5 It is a schematic structural diagram of a regeneration tower according to another embodiment of the present invention.

[0027] Figure 6 Schematic diagram of an adsorbent according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] Regeneration tower 100;

[0030] Tower body 1; adsorbent inlet 101; adsorbent outlet 102; material distribution chamber 103; material discharge chamber 104; regeneration chamber 105; buffer chamber 106; cooling chamber 107;

[0031] Fabric tube 2;

[0032] Fabric layer 3;

[0033] A first control valve 4;

[0034] The first feeding pipe 5;

[0035] The second feeding pipe 6;

[0036] Rapper 7;

[0037] Feed hopper 8;

[0038] Breathable outer shell 9. DETAILED DESCRIPTION

[0039] The embodiments of the present invention 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 invention, but should not be understood as limiting the present invention.

[0040] The technical solution of the present application is described in detail below with reference to the accompanying drawings.

[0041] like Figures 1 to 5 As shown, the regeneration tower 100 of the embodiment of the present invention includes a tower body 1 and a distribution pipe 2. The tower body 1 has an adsorbent inlet 101 and an adsorbent outlet 102, and the inner cavity of the tower body 1 includes a distribution cavity 103 located at the top of the inner cavity and connected to the adsorbent inlet 101, a lower cavity 104 located at the bottom of the inner cavity and connected to the adsorbent outlet 102, and a regeneration cavity 105 located between the distribution cavity 103 and the lower cavity 104.

[0042] The distribution pipe 2 has a feed end and a discharge end. The discharge end of the distribution pipe 2 extends from the adsorbent inlet 101 into the distribution cavity 103 and is used to distribute the adsorbent into the distribution cavity 103. The distribution pipe 2 can rotate relative to the tower body 1 to change the distribution position of the discharge end in the distribution cavity 103.

[0043] During the adsorbent regeneration process of the regeneration tower 100 of the embodiment of the present invention, on the one hand, since the discharge end of the distribution pipe 2 extends into the distribution cavity 103, the height difference between the discharge end of the distribution pipe 2 and the bottom of the distribution cavity 103 can be set relatively small. When the height of the distribution pipe 2 to the distribution layer 3 is equal to the discharge end of the distribution pipe 2, the discharge end of the distribution pipe 2 will be blocked by the distribution layer 3 and will no longer continue to discharge, but the thickness of the distribution layer 3 formed at this time is relatively small, so that the interaction force between the adsorbents in the distribution layer 3 is also relatively small, which can effectively avoid the problem of large interaction force between adsorbents caused by the accumulation of more adsorbents in the distribution layer 3, so that the adsorbent can continue to be discharged normally. When the thickness of the adsorbent discharged to the distribution layer 3 is lower than the discharge end of the distribution pipe 2, the distribution pipe 2 will continue to discharge into the distribution cavity 103.

[0044] On the other hand, since the distribution pipe 2 can rotate relative to the tower body 1 to change the distribution position of the discharge end in the distribution chamber 103, the distribution pipe 2 can discharge while rotating relative to the tower body 1, so that the adsorbent is distributed more evenly in the distribution chamber 103, which can further prevent the adsorbent from accumulating in a local position of the distribution chamber 103, so as to avoid blockage caused by the accumulation of the adsorbent in the local position, which is further beneficial to improve the discharge speed of the adsorbent and further help to improve the regeneration efficiency of the adsorbent.

[0045] Therefore, the regeneration tower 100 of the embodiment of the present invention has the advantages of uniform material distribution and high adsorbent regeneration efficiency.

[0046] In an embodiment of the present invention, the adsorbent may be a granular or powdered adsorbent, or an adsorbent body made of powdered or granular adsorbent, such as a sphere or cylinder formed by a powdered or granular adsorbent through a binder. Of course, a protective shell may be further formed on the outside of the adsorbent body, such as a breathable film covering the outside of the adsorbent body, to improve the strength of the adsorbent body.

[0047] like Figure 6 As shown, the adsorbent can be filled in the air-permeable housing 9 to form an adsorption unit. The adsorbent can be a granular or powdered adsorbent, or an adsorbent body made of a powder or granular adsorbent, such as a spherical body or a cylinder formed by a powder or granular adsorbent through a binder, etc. Of course, a protective shell can be further formed outside the adsorbent body, such as a breathable film covering the outside of the adsorbent body, to improve the strength of the adsorbent body.

[0048] The air-permeable housing 9 has air holes, through which smoke can enter the air-permeable housing 9, and smoke can pass through the gaps between adjacent adsorbents and / or the holes of the adsorbents themselves, thereby reducing direct collisions, friction and wear between adsorbents, and the generation of dust. The air-permeable housing 9 can be in the shape of a rotating body such as a sphere or a cylinder, wherein the diameter of the air-permeable housing 9 is 10 mm-100 mm, and the diameter of the adsorbent is 1 mm-10 mm.

[0049] In some embodiments, the regeneration tower 100 of the embodiment of the present invention further includes a supply hopper 8, and the feed end of the distribution pipe 2 is rotatably connected to the supply hopper 8.

[0050] For example, the feed end of the distribution pipe 2 is rotatably connected to the feed hopper 8 through a rolling bearing. Specifically, the rolling bearing is installed at the bottom end of the feed hopper 8, and the distribution pipe 2 is inserted on the rolling bearing and extends into the feed hopper 8, so that the adsorbent in the feed hopper 8 can enter the distribution pipe 2, and the distribution pipe 2 can also rotate relative to the feed hopper 8. The regeneration tower 100 of the embodiment of the present invention is rotatably connected to the feed hopper 8 by the feed end of the distribution pipe 2, so as to facilitate the feeding of the distribution pipe 2.

[0051] Optionally, a circular opening communicating with the material distribution cavity 103 may be provided at the top of the tower body 1 of the regeneration tower 100, and a disc is installed at the circular opening through a rolling bearing so that the disc can rotate relative to the tower body 1. The disc is provided with a through hole for the material distribution pipe 2 to pass through, and the feed end of the material distribution pipe 2 passes through the through hole and extends into the material distribution cavity 103. The outer peripheral surface of the material distribution pipe 2 is sealed and connected to the inner wall of the through hole. Under the action of the rolling bearing, the material distribution pipe 2 can rotate relative to the tower body 1 to change the material distribution position of the discharge end of the material distribution pipe 2 in the material distribution cavity 103.

[0052] Optionally, there are multiple material distribution pipes 2, and the discharge ends of the multiple material distribution pipes 2 are distributed at intervals in the material distribution cavity 103.

[0053] For example, Figures 1 to 4 As shown, the number of the distribution pipes 2 can be set to two or four or even more. The regeneration tower 100 of the embodiment of the present invention is further conducive to uniformly distributing the adsorbent in the distribution chamber 103 by providing a plurality of distribution pipes 2, and each distribution pipe 2 is rotatable relative to the tower body 1, so as to avoid local accumulation of the adsorbent in the distribution chamber 103, thereby further facilitating the discharge speed of the adsorbent, so as to improve the regeneration efficiency of the adsorbent.

[0054] Optionally, the discharging end of the distributing pipe 2 has a plurality of distributing openings, and the plurality of distributing openings are distributed along the circumference and / or radial direction of the tower body 1. In other words, the plurality of distributing openings may be distributed along the circumference of the tower body 1, or may be distributed along the radial direction of the tower body 1, or some of the distributing openings may be distributed along the circumference of the tower body 1, and the other may be distributed along the radial direction of the tower body 1.

[0055] For example, Figure 5 As shown, the discharge end of the distribution pipe 2 is a plurality of inclined straight segments, and the plurality of inclined straight segments are arranged in an umbrella shape. Each straight segment is provided with a plurality of spaced distribution ports along its length direction, so that the plurality of distribution ports are distributed in the circumferential and radial directions of the tower body 1, making the arrangement of the distribution ports convenient.

[0056] In some embodiments, the discharge ends of the plurality of material distribution pipes 2 are located in the same horizontal plane.

[0057] For example, Figure 1 As shown, the regeneration tower 100 of the embodiment of the present invention locates the discharge ends of multiple distribution pipes 2 in the same horizontal plane so that the adsorbent flowing out of the discharge end of each distribution pipe 2 can fall into the distribution cavity 103 at the same time, so as to avoid the distribution layer 3 formed in the distribution cavity 103 having an irregular shape due to the height difference of the discharge ends of the distribution pipes 2 in the vertical direction, which is not conducive to the discharge of the adsorbent.

[0058] In some embodiments, the discharge ends of multiple distribution pipes 2 are distributed along the circumference of the tower body 1 and the radial direction of the tower body 1. When the adsorbent enters the distribution cavity 103 from the discharge end of the distribution pipe 2, the adsorbent is distributed in the distribution cavity 103 in the circumferential direction and radial direction of the tower body 1, so that the adsorbent is distributed more evenly in the distribution cavity 103 to avoid local accumulation of the adsorbent in the distribution cavity 103, which makes it difficult to discharge the adsorbent, which is beneficial to improve the discharge speed of the adsorbent, and further helps to improve the regeneration efficiency of the adsorbent.

[0059] In some embodiments, the discharge ends of multiple distribution pipes 2 are evenly arranged within the cross-section of the inner cavity of the tower body 1, further making the adsorbent more evenly distributed in the distribution cavity 103, so as to avoid the difficulty of unloading due to local accumulation of the adsorbent in the distribution cavity 103, which is further beneficial to improve the unloading speed of the adsorbent and further beneficial to improve the regeneration efficiency of the adsorbent.

[0060] Alternatively, if Figure 2 As shown, when the cross-sectional size of the regeneration tower 100 is small, the number of the distribution pipes 2 can be two, and the two distribution pipes 2 are arranged in parallel.

[0061] Alternatively, if Figure 3 and Figure 4 As shown, there are four distribution pipes 2, and the discharging ends of the distribution pipes 2 are evenly spaced along the circumference of the tower body 1, and the projection of the distribution pipes 2 on the horizontal plane is parallel to one side of the cross section of the tower body 1, or the projection of the distribution pipes 2 on the horizontal plane extends along the diagonal line of the tower body 1. Specifically, there are multiple different configuration schemes for the number and arrangement orientation of the distribution pipes 2, so as to adapt to regeneration towers 100 of different sizes.

[0062] In some embodiments, a first control valve 4 is provided on the distribution pipe 2, and the first control valve 4 is used to control the discharge flow rate of the adsorbent in the distribution pipe 2. By adjusting the opening of the first control valve 4, the discharge speed and discharge amount of each distribution pipe 2 are controlled to avoid blockage caused by excessive adsorbent in a certain area of ​​the distribution chamber 103, so that the discharge adjustment of the distribution pipe 2 is convenient.

[0063] In some embodiments, the inner cavity of the tower body 1 further comprises a buffer cavity 106 and a cooling cavity 107 located between the regeneration cavity 105 and the feeding cavity 104. The buffer cavity 106 is located between the regeneration cavity 105 and the cooling cavity 107. A plurality of first feeding pipes 5 are arranged in the regeneration cavity 105. The feeding end of the first feeding pipe 5 is connected to the material distribution cavity 103, and the discharging end of the first feeding pipe 5 is connected to the buffer cavity 106.

[0064] A plurality of spaced-apart second feed pipes 6 are provided in the cooling chamber 107 , wherein a feed end of the second feed pipe 6 is communicated with the buffer chamber 106 , and a discharge end of the second feed pipe 6 is communicated with the feed chamber 104 .

[0065] like Figure 1 As shown, the regeneration tower 100 of the embodiment of the present invention is provided with a buffer chamber 106 between the regeneration chamber 105 and the cooling chamber 107. The adsorbent flowing out of the regeneration chamber 105 can play a buffering role in the buffer chamber 106, so that the adsorbent can smoothly flow downward into the cooling chamber 107. In addition, due to the different temperatures between the regeneration chamber 105 and the cooling chamber 107, the regeneration chamber 105 requires a heat exchange medium with a higher temperature for adsorbent desorption and regeneration, and the cooling chamber 107 requires a heat exchange medium with a lower temperature for adsorbent cooling. The adsorbent in the buffer chamber 106 can isolate the regeneration chamber 105 from the cooling chamber 107, prevent the temperatures between the regeneration chamber 105 and the cooling chamber 107 from affecting each other, and help improve the working reliability of the regeneration chamber 105 and the cooling chamber 107.

[0066] The regeneration tower 100 of the embodiment of the present invention is provided with a plurality of first feed pipes 5 in the regeneration chamber 105 and a plurality of second feed pipes 6 in the cooling chamber 107. In the regeneration chamber 105 and the cooling chamber 107, the adsorbent can be indirectly heat exchanged with the heat exchange medium through the feed pipes to avoid direct contact between the adsorbent and the heat exchange medium, which may cause contamination to the adsorbent and affect the adsorption and desorption effects of the adsorbent, thereby helping to improve the working reliability of the adsorbent.

[0067] Optionally, the regeneration chamber 105 and the cooling chamber 107 have the same height. Since the adsorbent moves under the action of its own gravity, the adsorbent can stay in the regeneration chamber 105 and the cooling chamber 107 in the tower body 1 for the same time, so as to avoid the adsorbent being unable to be fully heated and cooled due to staying in the regeneration chamber 105 or the cooling chamber 107 for too long or too short.

[0068] Optionally, the height of the buffer chamber 106 is smaller than that of the regeneration chamber 105 and the cooling chamber 107. Since the buffer chamber 106 is used to buffer the adsorbent, its height can be set smaller to reduce the overall height of the regeneration tower 100 and avoid manufacturing difficulties due to its excessive height.

[0069] Optionally, the regeneration tower 100 of the embodiment of the present invention further includes a rapper 7, which is disposed at a position on the tower body 1 corresponding to the regeneration chamber 105. Specifically, when the adsorbent blocks the first feed pipe 5 in the regeneration chamber 105, the rapper 7 can be used to rap and shake the part of the regeneration chamber 105 of the tower body 1 to clear the adsorbent blocked in the first feed pipe 5.

[0070] The low-temperature adsorption regeneration system of the embodiment of the present invention includes a regeneration tower 100, an adsorption tower (not shown in the figure) and a spray cooling tower (not shown in the figure). The regeneration tower 100 is the regeneration tower 100 described in any of the above embodiments. The adsorbent discharged from the discharge port of the adsorption tower is transported to the feed end of the distribution pipe of the regeneration tower 100. The spray cooling tower is connected to the adsorption tower and is used to cool the flue gas to below zero degrees before transporting it to the adsorption tower. By using the spray cooling tower to cool the flue gas to below zero degrees before entering the adsorption tower, the overall temperature in the adsorption tower can be reduced, and the adsorption efficiency of the adsorbent in a low temperature environment will be greatly improved, which is further conducive to improving the adsorption efficiency of the adsorbent.

[0071] Therefore, the low-temperature adsorption regeneration system of the embodiment of the present invention has the advantages of high adsorbent regeneration efficiency.

[0072] In the embodiment of the present invention, the low-temperature flue gas is flue gas below zero degrees, so that the adsorbent performs low-temperature adsorption on the flue gas, improves the adsorption effect, and can achieve near-zero emissions. Preferably, the temperature of the low-temperature flue gas is below zero, for example, -80°C to -5°C. More preferably, the temperature of the low-temperature flue gas 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 complex and the energy consumption will increase. For example, the cooling equipment, the adsorption tower, and the pipeline have high requirements for sealing, which will increase the cost. In addition, too low temperature conditions will easily cause condensation water to appear in the adsorption chamber, causing the adsorbent to stick and clog, affecting the adsorption. Therefore, it is beneficial to cool the flue gas temperature to -20°C to -10°C.

[0073] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0075] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0076] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature 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. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0077] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0078] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A regeneration tower with uniform distribution, characterized in that: include: A tower body, wherein the tower body has an adsorbent inlet and an adsorbent outlet, and the inner cavity of the tower body comprises a distribution cavity located at the top of the inner cavity and connected to the adsorbent inlet, a lowering cavity located at the bottom of the inner cavity and connected to the adsorbent outlet, and a regeneration cavity located between the distribution cavity and the lowering cavity; A distribution pipe, wherein the distribution pipe has a feed end and a discharge end, the discharge end of the distribution pipe extends from the adsorbent inlet into the distribution cavity, and is used to distribute the adsorbent into the distribution cavity. The distribution pipe is rotatable relative to the tower body to change the distribution position of the discharge end in the distribution cavity.

2. The regeneration tower with uniform distribution according to claim 1, characterized in that: It also includes a feeding hopper, and the feeding end of the material distribution pipe is rotatably connected to the feeding hopper.

3. The regeneration tower with uniform distribution according to claim 2, characterized in that: There are a plurality of material distribution pipes, and the discharge ends of the plurality of material distribution pipes are distributed at intervals in the material distribution cavity.

4. The regeneration tower according to any one of claims 1 to 3, characterized in that: The material distributing pipe has a plurality of material distributing openings at the material distributing end, and the plurality of material distributing openings are distributed along the circumferential direction and / or radial direction of the tower body.

5. The regeneration tower with uniform distribution according to claim 3, characterized in that: The discharge ends of the plurality of material distribution pipes are located in the same horizontal plane.

6. The uniform distribution regeneration tower according to claim 3, characterized in that: The discharge ends of the plurality of material distribution pipes are distributed along the circumferential direction of the tower body and the radial direction of the tower body.

7. The regeneration tower with uniform distribution according to claim 6, characterized in that: The discharge ends of the plurality of material distribution pipes are evenly arranged in the cross section of the inner cavity of the tower body.

8. The regeneration tower with uniform distribution according to claim 1, characterized in that: The distribution pipe is provided with a first control valve, and the first control valve is used to control the discharge flow rate of the adsorbent in the distribution pipe.

9. The regeneration tower with uniform distribution according to claim 1, characterized in that: The inner cavity of the tower body further comprises a buffer cavity and a cooling cavity located between the regeneration cavity and the material discharging cavity, wherein the buffer cavity is located between the regeneration cavity and the cooling cavity, and a plurality of first material discharging pipes are arranged in the regeneration cavity, wherein the feeding end of the first material discharging pipe is communicated with the material distributing cavity, and the discharging end of the first material discharging pipe is communicated with the buffer cavity; A plurality of spaced-apart second feed pipes are arranged in the cooling cavity, a feed end of the second feed pipe is communicated with the buffer cavity, and a discharge end of the second feed pipe is communicated with the feed cavity.

10. A low temperature adsorption regeneration system, characterized in that: include: A regeneration tower, wherein the regeneration tower is the regeneration tower according to any one of claims 1 to 9; An adsorption tower, wherein the adsorbent discharged from the discharge port of the adsorption tower is transported to the feed end of the distribution pipe of the regeneration tower; and A spray cooling tower is connected to the adsorption tower and is used to cool the flue gas to below zero degrees and then transport it to the adsorption tower.

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