An activated carbon denitrification tower

Abstract

The present application provides an activated carbon denitrification tower. The activated carbon denitrification tower is used for desulfurization and denitrification of flue gas. The denitrification tower is provided with an air intake area, a denitrification area and an exhaust area in sequence from the inside to the outside in the radial direction. The air intake area is provided with at least one air intake port. The denitrification area is filled with activated carbon. The exhaust area is provided with an exhaust port. The flue gas enters the air intake area in the up-down direction through the air intake port, and penetrates from the air intake area to the denitrification area in the radial direction. After being desulfurized and denitrified by the activated carbon in the denitrification area, the flue gas enters the exhaust area and is discharged from the exhaust port. The penetration direction of the flue gas in the denitrification area is perpendicular to the movement direction of the activated carbon in the denitrification area.

Description

Technical Field

[0001] The present application relates to the technical field of flue gas denitration equipment, and in particular to an activated carbon denitration tower. Background Art

[0002] The importance of removing nitrogen oxides from combustion flue gas and preventing environmental pollution has become a sharp issue worldwide. Activated carbon desulfurization and denitrification is one of the commonly used flue gas treatment methods. The sulfur dioxide adsorbed by activated carbon can be effectively used to make sulfuric acid, ammonium sulfate, sodium pyrosulfite, etc. Activated carbon denitrification is the lowest temperature method of reduction denitrification at present, but the dust in the original flue gas and the dust generated by the wear of activated carbon can easily cause the dust emission of flue gas after activated carbon desulfurization and denitrification to exceed the standard.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0004] The purpose of the present application is to provide an activated carbon denitrification tower to solve or alleviate the problems existing in the above-mentioned prior art.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] The present application provides an activated carbon denitrification tower for desulfurizing and denitrifying flue gas, wherein the denitrification tower is provided with an air intake zone, a denitrification zone and an exhaust zone in sequence from the inside to the outside in a radial direction, wherein the air intake zone is provided with at least one air inlet, the denitrification zone is filled with activated carbon, and the exhaust zone is provided with an exhaust port; the flue gas enters the air intake zone through the air inlet in an up-and-down direction, and penetrates radially from the air intake zone to the denitrification zone, enters the exhaust zone after being desulfurized and denitrified by the activated carbon in the denitrification zone, and is discharged from the exhaust port; wherein the penetration direction of the flue gas in the denitrification zone is perpendicular to the moving direction of the activated carbon in the denitrification zone.

[0007] Optionally, in any embodiment of the present application, there is one air inlet; the air inlet is located at the top of the air inlet area, and correspondingly, the exhaust port is located at the bottom of the outer wall of the exhaust area; or, the air inlet is located at the bottom of the air inlet area, and correspondingly, the exhaust port is located at the top of the outer wall of the exhaust area.

[0008] Optionally, in any embodiment of the present application, there are two air inlets, which are arranged opposite to each other and are respectively located at the top and bottom of the air inlet area; correspondingly, the exhaust port is located in the middle of the outer wall of the exhaust area.

[0009] Optionally, in any embodiment of the present application, the inlet cross-section of the denitrification zone is smaller than the outlet cross-section, and the inlet and outlet cross-sections of the denitrification zone are both cylindrical.

[0010] Optionally, in any embodiment of the present application, a radial dimension of the exhaust zone gradually increases along a flow direction of the flue gas in the exhaust zone.

[0011] Optionally, in any embodiment of the present application, the axial cross-section of the exhaust zone is triangular.

[0012] Optionally, in any embodiment of the present application, a flow guiding and pressure equalizing body is provided in the air intake area, and a radial dimension of the flow guiding and pressure equalizing body gradually increases along a flow direction of the flue gas in the air intake area.

[0013] Optionally, in any embodiment of the present application, the air intake area is cylindrical, and the flow guiding and pressure equalizing body and the axis of the flow guiding and pressure equalizing body coincide with the axis of the air intake area.

[0014] Optionally, in any embodiment of the present application, along the flow direction of the flue gas in the air intake zone, the radial size of the air intake zone gradually decreases.

[0015] Optionally, in any embodiment of the present application, the cross-section of the exhaust zone is a circular ring.

[0016] Compared with the closest prior art, the technical solution of the embodiment of the present application has the following beneficial effects:

[0017] In the technical solution of the activated denitrification tower provided in the embodiment of the present application, the denitrification tower is provided with an air intake area, a denitrification area and an exhaust area in sequence from the inside to the outside in the radial direction; at least one air intake port is provided in the air intake area, the denitrification area is filled with activated carbon, and an exhaust port is provided in the exhaust area; the flue gas that needs to be desulfurized and denitrified enters the air intake area from the air intake port in the up and down direction, and in the air intake area, penetrates radially into the denitrification area, and the flue gas that penetrates into the denitrification area enters the exhaust area after being desulfurized and denitrified by the activated carbon, and is discharged from the exhaust port; the activated carbon enters from the top of the denitrification area and moves from top to bottom, and the flue gas enters from the inner side of the denitrification area, moves along the radial direction of the denitrification area, and is discharged from the outer side of the denitrification area. The flow rate of the flue gas is reduced when it is discharged, which reduces the carrying of dust, so that the dust emission standard can be reached after the denitrification standard is met. In this way, the flue gas and the activated carbon are desulfurized and denitrified in a cross-flow manner, which effectively improves the effect of the activated carbon in the denitrification area on the flue gas desulfurization and denitrification, so that the flue gas discharged from the exhaust area meets the emission standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. Among them:

[0019] Figure 1A schematic diagram of a main view of an activated carbon denitration tower provided according to an embodiment of the present application;

[0020] Figure 2 for Figure 1 A schematic top view of an activated carbon denitration tower provided in the illustrated embodiment;

[0021] Figure 3 A schematic diagram of the structure of another activated carbon denitrification tower provided according to some embodiments of the present application;

[0022] Figure 4 It is a schematic diagram of the appearance of the exhaust area and the flow-guiding and pressure-equalizing body of the activated carbon denitration tower provided according to some embodiments of the present application;

[0023] Figure 5 This is a schematic diagram of the structure of another activated carbon denitrification tower provided according to some embodiments of the present application.

[0024] Description of reference numerals:

[0025] 101 - air intake area; 111 - air intake port; 121 - flow guide and pressure equalizing body; 102 - denitration area; 103 - exhaust area; 113 - exhaust port. DETAILED DESCRIPTION

[0026] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present application and does not limit the present application. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present application without departing from the scope or spirit of the present application. For example, a feature shown or described as a part of an embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present application includes such modifications and variations within the scope of the appended claims and their equivalents.

[0027] In the description of the present application, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and do not require that the present application must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application. The terms "connected", "connected", and "set" used in the present application should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component; it can be a wired electrical connection, a radio connection, or a wireless communication signal connection. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] Figure 1A schematic diagram of a main view of an activated carbon denitration tower provided according to an embodiment of the present application; Figure 2 for Figure 1 The schematic top view of the activated carbon denitration tower provided in the embodiment shown; Figure 1 , Figure 2 As shown, the activated carbon denitrification tower is used to desulfurize and denitrate the flue gas, and the denitrification tower is provided with an air intake area 101, a denitrification area 102 and an exhaust area 103 in sequence from the inside to the outside in the radial direction; the air intake area 101 is provided with at least one air intake port 111, the denitrification area 102 is filled with activated carbon, and the exhaust area 103 is provided with an exhaust port 113; the flue gas enters the air intake area 101 in the up and down direction through the air intake port 111, and penetrates from the air intake area 101 to the denitrification area 102 in the radial direction, and enters the exhaust area 103 after the activated carbon desulfurizes and denitrates in the denitrification area 102, and is discharged from the exhaust port 113; wherein, the penetration direction of the flue gas in the denitrification area 102 is perpendicular to the movement direction of the activated carbon in the denitrification area 102. It can be understood that the above description is only exemplary, and the embodiments of the present application are not limited to this.

[0029] In the embodiment of the present application, the activated carbon moves from the denitration zone 102 from top to bottom, and after the flue gas to which the denitrification agent (generally ammonia) needs to be added enters the air intake zone 101, the penetration from the air intake zone 101 to the denitration zone 102 is carried out in a radial direction; so that the penetration of the flue gas in the denitration zone 102 is carried out in a cross-flow manner with the activated carbon. After the flue gas is desulfurized and denitrated by the activated carbon in the denitration zone 102, it enters the exhaust zone 103. Thereby, the effect of the activated carbon in the denitration zone 102 on the desulfurization and denitrification of the flue gas is effectively improved. It can be understood that the above description is only exemplary, and the embodiment of the present application does not limit this.

[0030] During the design, the average speed of flue gas passing through the activated carbon is the same as that of the conventional activated carbon denitrification tower. The inlet flue gas flow rate of the denitrification zone 102 in this design is greater than the conventional speed, while the outlet flue gas flow rate is less than the conventional speed. The flow rate of the flue gas is reduced when it is discharged, which reduces the carryover of dust, so that the dust emission standard can be met after the denitrification standard is met.

[0031] In some optional embodiments, there is one air inlet 111; the air inlet 111 is located at the top of the air inlet area 101, and correspondingly, the exhaust port 113 is located at the bottom of the outer wall of the exhaust area 103; or, the air inlet 111 is located at the bottom of the air inlet area 101, and correspondingly, the exhaust port 113 is located at the top of the outer wall of the exhaust area 103. It can be understood that the above description is only exemplary and is not limited to this embodiment of the present application.

[0032] In the embodiment of the present application, when the air inlet 111 is arranged at the top of the air inlet area 101 and the exhaust port 113 is arranged at the bottom of the outer wall of the exhaust area 103, after the flue gas enters the air inlet area 101 through the air inlet 111, it moves from top to bottom in the air inlet area 101, and the flue gas after desulfurization and denitrification moves from top to bottom in the exhaust area 103 and is discharged through the exhaust port 113; or, when the air inlet 111 is arranged at the bottom of the air inlet area 101 and the exhaust port 113 is arranged at the top of the outer wall of the exhaust area 103, after the flue gas enters the air inlet area 101 through the air inlet 111, it moves from bottom to top in the air inlet area 101, and the flue gas after desulfurization and denitrification moves from bottom to top in the exhaust area 103 and is discharged through the exhaust port 113. In this way, the flue gas at each height can pass through the activated carbon layer evenly, so that the activated carbon can fully desulfurize and denitrify the flue gas and then be discharged from the exhaust port 113. If the air inlet 111 and the exhaust port 113 are at the same height, the flue gas will form a short circuit at this height, and the flue gas throughput at this height will be greatly increased, and the flow rate will also increase, reducing the contact time between the flue gas and the activated carbon, resulting in insufficient denitrification. At heights far away from the entrance and exit, the flue gas throughput rate will be greatly reduced, that is, different heights cannot obtain the same pressure drop, resulting in uneven denitrification, and then excessive nitrogen oxides. The purpose of this approach is to make the radial inlet and outlet flue gas pressure drop of each area the same, so that the flue gas can pass through the denitrification layer evenly. If there are other ways to meet this requirement, the outlet position may not be limited. It can be understood that the above description is only exemplary, and the embodiments of the present application do not limit this.

[0033] In some optional embodiments, there are two air inlets 111, which are arranged opposite to each other and are respectively located at the top and bottom of the air inlet area 101; correspondingly, the exhaust port 113 is located in the middle of the outer wall of the exhaust area 103. It can be understood that the above description is only exemplary and is not limited to this embodiment of the present application.

[0034] In the embodiment of the present application, two opposite air inlets 111 are arranged at the top and bottom of the air inlet zone 101, so that the flue gas enters the air inlet zone 101 from the top and bottom of the air inlet zone 101, and flows from the top and bottom of the air inlet zone 101 to the middle of the air inlet zone 101; the exhaust port 113 is arranged in the middle of the outer wall of the exhaust zone 103, so that the flue gas after desulfurization and denitrification flows from the top and bottom of the exhaust zone 103 to the middle, and is discharged through the exhaust port 113. In this way, the residence time of the flue gas to be desulfurized and denitrated in the denitration zone 102 is fully increased, and the effect of the activated carbon in the denitration zone 102 on the desulfurization and denitrification of the flue gas is further improved, so that the flue gas discharged from the exhaust zone 103 meets the emission standards. It can be understood that the above description is only exemplary, and the embodiment of the present application does not limit this.

[0035] In some optional embodiments, the radial dimension of the exhaust zone 103 gradually increases along the flow direction of the flue gas in the exhaust zone 103. It is understandable that the above description is only exemplary and the embodiments of the present application do not limit this. The central axis section of the outer wall of a specific exhaust zone 103 is parabolic, ensuring that the area of ​​each height section is proportional to the height. In actual construction, a variety of cones will be used to form the outer shell to form a structure that is approximately parabolic, or a cone can be made to overlap with most areas of the parabola. In the air intake zone 101, a guide and pressure equalizer 121 is added, which is also a parabolic structure. In actual construction, a variety of cones will be used to form the outer shell to form a structure that is approximately parabolic, or a cone can be made to overlap with most areas of the parabola. The sum of the cross-sectional areas at the same height of the air intake zone 101 and the exhaust zone 103 is equal. The guide and pressure equalizer 121 of the air intake zone 101 can also be roughly considered as a cone.

[0036] In the embodiment of the present application, when the flue gas passes through the activated carbon layer, as it approaches the exhaust area, the cross-sectional area of ​​the carbon layer through which the flue gas passes gradually increases, and when the flue gas enters the exhaust area, the flue gas flow rate decreases, effectively reducing the dust carried away when the flue gas is discharged, and the flue gas discharged from the exhaust area 103 meets the emission standards. It can be understood that the above description is only exemplary, and the embodiment of the present application does not limit this.

[0037] In a specific example, the axial cross section of the exhaust zone 103 is a triangle. The outer side of the exhaust zone 103 is preferably a parabola, ensuring that the cross section of the exhaust zone at each height is proportional to the amount of gas that has been exhausted. When the device is large enough, the parabola here is approximately a straight line and can be replaced by a straight line. Therefore, the axial cross section of the exhaust zone 103 is approximately a triangle. Figure 4 As shown, the parabola of the axial section of the exhaust zone 103 is shown in the following formula (1):

[0038]

[0039] Among them, X0 and X1 are the radial directions of the inner and outer sides of the denitrification zone along the X-axis (horizontal direction) respectively; Y0 is the height of the denitrification tower along the Y-axis (vertical direction).

[0040] The gas discharged from the bottom of the exhaust zone 103 moves upward to a certain height, at which smoke is also discharged. These smokes are mixed and continue to move upward, and so on, eventually reaching the top of the exhaust zone 103, and the smoke enters the exhaust port 113.

[0041] In the embodiment of the present application, the axial cross section of the exhaust area 103 is approximately triangular, thereby facilitating maintenance and construction. In other embodiments, the axial cross section of the exhaust area 103 may also be rectangular.

[0042] In the embodiment of the present application, an air intake zone 101, a denitrification zone 102 and an exhaust zone 103 are sequentially arranged along the radial direction of the denitrification tower from the inside to the outside, and the denitrification tower as a whole is shaped like a truncated cone (if the outer wall of the exhaust zone 103 is replaced by a cone, it is a truncated cone). The center of the truncated cone is set as the air intake area 101 along the axial direction. The shape of the air intake area 101 is cylindrical. A flow guide equalizing body 121 can be set in the truncated cone, and the air inlet 111 is set at the small end of the truncated cone; the periphery of the air intake area 101 is the denitration area 102, the cross section of the denitration area 102 is annular, and the outer circle diameter of the denitration area 102 is less than or equal to the small end diameter of the truncated cone desulfurization and denitration tower, and the inner circle diameter of the denitration area 102 is the same as the diameter of the cylindrical air intake area 101; and the exhaust area 103 is between the outer wall of the denitration area 102 and the outer wall of the truncated cone, and the exhaust port 113 is radially set at the large end of the truncated cone, and the axial section between the outer wall of the denitration area 102 and the outer wall of the truncated cone is a triangle. In this way, the flow velocity of the flue gas after desulfurization and denitration in the exhaust area 103 is effectively reduced, and the dust carried away when the flue gas is discharged is reduced, so that the flue gas discharged from the exhaust area 103 meets the emission standards. It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0043] Figure 3 Schematic diagram of the structure of another activated carbon denitrification tower provided according to some embodiments of the present application; Figure 3 As shown, in the denitration tower, a flow guide and pressure equalizing body 121 is provided in the air inlet area 101, and the radial dimension of the flow guide and pressure equalizing body 121 gradually increases along the flow direction of the flue gas in the air inlet area 101. It can be understood that the above description is only exemplary and the embodiments of the present application do not limit this.

[0044] In the embodiment of the present application, the axial cross section of the flow-guiding and pressure-equalizing body 121 is preferably a parabola, and can be composed of a plurality of cones to form an approximate parabola. When a thicker shape is required, a cone can be used instead. Figure 4 As shown, the parabola of the axial cross section of the flow guiding and pressure equalizing body 121 is shown in the following formula (2):

[0045]

[0046] In the embodiment of the present application, since the exhaust port 113 and the air inlet 111 are respectively located at the two ends of the denitrification tower, when the radial dimension of the flow-guiding equalizing body 121 gradually increases along the flow direction of the flue gas, the large end of the flow-guiding equalizing body 121 and the exhaust port 113 are located on the same side of the denitrification tower, and the flue gas after desulfurization and denitrification entering the denitrification zone 102 from the large end of the flow-guiding equalizing body 121 will be discharged from the exhaust port 113 in a shorter time. Therefore, by setting the flow-guiding equalizing body 121, the flue gas that needs to be desulfurized and denitrified flows along the outer wall of the flow-guiding equalizing body 121 in the air inlet zone 101, and the flue gas is diverted, so that the amount of desulfurized and denitrified flue gas at each height entering the denitrification zone 102 from the small end to the large end of the flow-guiding equalizing body 121 is the same, which helps the desulfurized and denitrified flue gas entering the denitrification zone 102 through the large end of the flow-guiding equalizing body 121 to be fully desulfurized and denitrified in the denitrification zone 102. It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0047] In a specific example, the air intake area 101 is cylindrical, and the guide pressure equalizer 121 is preferably parabolic. The project can use a variety of cones to splice into a parabola-like shape, and roughly consider it to be conical, and the axis of the guide pressure equalizer 121 coincides with the axis of the air intake area 101. In this way, the pressure equalization effect on the flue gas is better, making the flue gas more balanced when desulfurizing and denitrifying in the denitration area 102. It can be understood that the above description is only exemplary, and the embodiments of the present application are not limited to this.

[0048] Figure 5 Schematic diagram of the structure of another activated carbon denitrification tower provided according to some embodiments of the present application; Figure 5 As shown, in the denitration tower, the radial dimension of the air inlet zone 101 gradually decreases along the flow direction of the flue gas in the air inlet zone 101. It can be understood that the above description is only exemplary and the embodiments of the present application do not limit this.

[0049] In the embodiment of the present application, the denitration tower is cylindrical as a whole, that is, the outer wall of the exhaust zone 103 is cylindrical; since the exhaust port 113 and the air inlet 111 are respectively arranged at both ends of the denitration tower, by gradually reducing the radial dimension of the air inlet zone 101 along the flow direction of the flue gas in the air inlet zone 101, the amount of flue gas desulfurized and denitrated at the small end of the air inlet zone 101 is small, which helps to make the flue gas more balanced when desulfurized and denitrated in the denitration zone 102. It can be understood that the above description is only exemplary, and the embodiment of the present application does not limit this.

[0050] In some optional embodiments, the cross section of the exhaust area 103 is a circular ring; the cross section of the exhaust port 113 in the direction perpendicular to the exhaust direction of the smoke is a rectangular. This facilitates the processing and manufacturing of the exhaust port 113 in the exhaust area 103. It is understood that the above description is only exemplary and is not limited to this embodiment of the present application.

[0051] In some optional embodiments, the area of ​​the first cross section of the exhaust zone 103 is greater than the area of ​​the second cross section of the air inlet 111; wherein the first cross section is the cross section of the exhaust port 113 in a direction perpendicular to the smoke exhaust direction, and the second cross section is the cross section of the air inlet 111 in the direction in which the smoke enters the exhaust zone 103. It can be understood that the above description is only exemplary and is not limited in the embodiments of the present application.

[0052] In the embodiment of the present application, the cross section of the flue gas entering the activated carbon denitrification zone 102 from the air intake zone 101 is the product of the inlet circumference and the height of the denitrification tower, and the cross section of the flue gas entering the exhaust zone 103 from the activated carbon denitrification zone 102 is the product of the outlet inner wall circumference and the height of the denitrification tower. The circumference is πd (d is the diameter), and the outlet diameter is larger than the inlet diameter. Therefore, the inlet cross section of the activated carbon denitrification zone 102 is smaller than the outlet cross section, and the speed of the flue gas in discharging the activated carbon denitrification zone 102 is lower than the speed of entering the activated carbon denitrification zone 102. In this way, the dust carried away by the flue gas when it is discharged is reduced, so that the flue gas discharged from the exhaust zone 103 meets the emission standards. It can be understood that the above description is only exemplary and the embodiment of the present application does not limit this.

[0053] In the embodiment of the present application, no matter whether the denitration tower is cylindrical or truncated cone, the effective intake surface area of ​​the intake zone 101 is smaller than the effective exhaust surface area of ​​the exhaust zone 103, that is, the intake surface area is smaller than the exhaust surface area. For example, when the height of the denitration tower is H, the cross-sectional diameter of the intake zone 101 is d (that is, the inner diameter of the denitration zone 102 is d), and the cross-sectional diameter of the exhaust zone 103 is D (that is, the outer diameter of the denitration zone 102 is D), the inner ring surface area of ​​the denitration zone 102 is π*d*H, and the outer ring surface area of ​​the denitration zone 102 is π*D*H. Since the inner ring surface area of ​​the denitration zone 102 is smaller than the outer ring surface area, the flue gas flow speed of the inner ring of the denitration zone 102 is faster, while the flue gas flow speed of the outer ring of the denitration zone 102 is slower. When the flue gas is discharged from the denitration zone 102 to the exhaust zone 103 at a lower rate, the dust carried in the flue gas is less. In this way, it is possible to fully ensure that the flue gas enters the exhaust area 103 from the denitrification area 102 at a lower speed, reduce the dust carried by the flue gas when it is discharged, and make the flue gas discharged from the exhaust area 103 meet the emission standards. It can be understood that the above description is only exemplary and the embodiments of the present application are not limited to this.

[0054] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An activated carbon denitrification tower for desulfurization and denitrification of flue gas, characterized in that: The denitration tower is provided with an air intake area, a denitration area and an exhaust area in sequence from the inside to the outside in radial direction. The air intake area is provided with at least one air intake port, the denitration area is filled with activated carbon, and the exhaust area is provided with an exhaust port; The flue gas enters the air intake zone in the up-down direction through the air intake port, and penetrates radially from the air intake zone to the denitration zone, and after being desulfurized and denitrated by the activated carbon in the denitration zone, enters the exhaust zone, and is discharged from the exhaust port; Wherein, the permeation direction of the flue gas in the denitration zone is perpendicular to the movement direction of the activated carbon in the denitration zone; The air inlet is located at the top of the air inlet area, and correspondingly, the exhaust port is located at the bottom of the outer wall of the exhaust area; or, the air inlet is located at the bottom of the air inlet area, and correspondingly, the exhaust port is located at the top of the outer wall of the exhaust area; A flow guiding and pressure equalizing body is provided in the air intake area, and the radial dimension of the flow guiding and pressure equalizing body gradually increases along the flow direction of the smoke in the air intake area; along the flow direction of the smoke in the air intake area, the radial dimension of the air intake area gradually decreases; The inlet cross section of the denitrification zone is smaller than the outlet cross section; The radial dimension of the exhaust zone gradually increases along the flow direction of the flue gas in the exhaust zone; The central axis cross-section of the outer wall of the exhaust zone is parabolic; the sum of the cross-sectional areas of the air inlet zone at any height of the denitration tower and the exhaust zone at the same height is equal.

2. The activated carbon denitration tower according to claim 1, characterized in that: There are two air inlets, which are arranged opposite to each other and are located at the top and bottom of the air inlet area respectively; Correspondingly, the exhaust port is located in the middle of the outer side wall of the exhaust area.

3. The activated carbon denitration tower according to claim 1 or 2, characterized in that: The cross section of the exhaust zone is a circular ring.

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