Reactor for removing carbon monoxide in flue gas and flue gas desulfurization and denitrification system

Abstract

The utility model relates to a flue gas purification technology, and particularly discloses a reactor for removing carbon monoxide in flue gas and a flue gas desulfurization and denitrification system.The reactor for removing carbon monoxide in flue gas comprises a first flow guide part, a second flow guide part and a flow equalizing part, the first flow guide part is arranged at the position close to a flue gas inlet, and the second flow guide part is arranged at the position close to a flue gas outlet; the second flow guide part is arranged at the position close to the flue gas outlet, the flow equalizing part is arranged between the first flow guide part and the catalysis assembly, and the flow guide directions of the first flow guide part and the second flow guide part extend in the preset flue gas flowing direction. Through the cooperative design of the first flow guide part, the second flow guide part and the flow equalizing part, uniform flow of air flow can be realized, and the catalytic reaction efficiency of the reactor is optimized and improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial flue gas purification, in particular to a reactor for removing carbon monoxide in flue gas and a flue gas desulfurization and denitrification system. BACKGROUND

[0002] With the implementation of the industrial flue gas ultra-low emission policy, the sulfides, nitrogen oxides and dust in the industrial flue gas are well treated and discharged, and the CO emission problem has begun to be concerned. At present, most of the industrial flue gas CO removal adopts the method of adding CO catalyst modules inside the flue or inside the SCR reaction bin, but the number of CO catalyst arrangement is limited, and the effect is not good. At the same time, the CO catalyst module is easy to be blocked by dust, and the above-mentioned built-in series arrangement cannot be independently overhauled.

[0003] The prior art discloses a reactor for carbon monoxide catalytic oxidation and a flue gas treatment device, which comprises a reactor body, a catalyst layer, a heating device, a cooling device and a sound wave ash removal device, which can improve the removal efficiency of carbon monoxide. The reactor is an independent external solution, but it needs heating and cooling devices, and cannot realize ash removal and external discharge, and the removal efficiency still needs to be improved. CONTENT OF THE UTILITY MODEL

[0004] In order to solve at least one of the above problems, the present application provides a reactor for removing carbon monoxide in flue gas; and based on the reactor for removing carbon monoxide in flue gas, a flue gas desulfurization and denitrification system is provided.

[0005] In the first aspect, the present application provides a reactor for removing carbon monoxide in flue gas, which adopts the following technical scheme:

[0006] A reactor for removing carbon monoxide in flue gas, comprising a reactor body and a catalytic assembly, wherein the reactor body is provided with a flue gas inlet and a flue gas outlet in sequence along a preset flue gas flow direction respectively, the catalytic assembly is arranged in the reactor body, further comprising a first flow guide, a second flow guide and a flow equalizer, the first flow guide is arranged at a position close to the flue gas inlet, the second flow guide is arranged at a position close to the flue gas outlet, and the flow equalizer is arranged between the first flow guide and the catalytic assembly, and the flow guide directions of the first flow guide and the second flow guide extend along the preset flue gas flow direction respectively.

[0007] By adopting the above technical scheme, the first flow guide, the second flow guide and the flow equalizer can realize better airflow uniform flow effect, thereby optimizing and improving the catalytic reaction efficiency of the reactor, and further improving the CO removal efficiency.

[0008] Preferably, the number of the first and second flow guides is at least two, the first and second flow guides are plate structures, the at least two first flow guides are spaced apart, the at least two second flow guides are spaced apart, and the included angles between adjacent two first flow guides are the same or different, and the included angles between adjacent two second flow guides are the same or different.

[0009] By adopting the above technical solution, as a specific structural example, the number of the first and second flow guides is multiple, and both are plate structures, such as common plate-shaped flow guide vanes. In the multiple first flow guides, the length direction of the multiple vane-shaped first flow guides can extend along the preset flue gas flow direction, the inclination angle of the first flow guide along the length direction is 45° (it can also be 15°, 30°, 60°, etc.), and the multiple first flow guides are parallelly arranged, that is, the inclination angles are the same. The inclination angles of the multiple first flow guides can also be different, for example, in the case where the overall angle inclination direction extends along the preset flue gas flow direction, the inclination angle of a first flow guide is 15°, and the inclination angle of another first flow guide adjacent to it is 20°. In principle, as long as the end portion of the multiple first flow guides close to the flue gas outlet does not physically interfere, it is acceptable. The second flow guide is the same as above, and thus will not be described again.

[0010] Preferably, the flow uniformizer is a grid structure or a honeycomb structure.

[0011] By adopting the above technical solution, as a specific structural example, the flow uniformizer is a grid structure or a honeycomb structure. In the grid structure of the flow uniformizer, the spacing distances between the partitions can be the same or different, and the spacing spaces surrounded by the partitions can be regular spaces with the same size and uniform arrangement, or spacing spaces with different sizes and irregular arrangement. Similarly, in the honeycomb structure of the flow uniformizer, the sizes of the honeycomb cavities can also be the same or different. In terms of material, the flow uniformizer can select common heat-insulating and high-temperature-resistant materials, such as bricks that meet the temperature resistance parameter requirements.

[0012] Preferably, a flow resistance member is further included, the flow resistance member is arranged between the flue gas inlet and the flow uniformizer and is a plate structure, and the extension direction of the plate structure of the flow resistance member has an included angle with the preset flue gas flow direction.

[0013] Preferably, an adjusting valve is further included, and the adjusting valve is arranged at least one of the positions close to the flue gas inlet and the flue gas outlet.

[0014] By adopting the technical scheme, as a structural example, the flow resistance member is additionally arranged, and the extension direction of the flow resistance member has an angle with the preset flue gas flow direction, that is, the extension direction of the flow resistance member is different from the preset flue gas flow direction, and then the flue gas enters the reactor body from the flue gas inlet through the first flow guide member, the flow resistance member can prolong the time of flue gas flowing to the flow uniformizer, and then the uniform distribution effect of the flue gas flowing through the flow uniformizer is optimized.

[0015] As a structural example, an adjusting valve is additionally arranged near the flue gas inlet and near the flue gas outlet, which can open or close the flue gas inlet and the flue gas outlet, and can also adjust the flue gas amount at the flue gas inlet and the flue gas outlet.

[0016] Preferably, the reactor body is provided with an inspection opening and a catalyst assembly mounting opening at the preset position.

[0017] By adopting the technical scheme, as a structural example, according to the actual structural distribution of the reactor body and the catalyst assembly, the inspection opening and the catalyst assembly mounting opening with a size matching the requirement are arranged on the wall of the reactor body at the preset position, for example, generally, the size requirement of the inspection opening is small, and an inspection hole or window for the operation of the inspection personnel can be arranged, the size requirement of the catalyst assembly mounting opening is large, and the size of the opening for the entry and exit of the related personnel is arranged, and an adaptive door is arranged to realize the opening and closing function.

[0018] Preferably, the catalyst assembly comprises catalyst units in a hierarchical structure and at least two layers, and the at least two layers of catalyst units are arranged in sequence and along the preset flue gas flow direction.

[0019] Preferably, the catalyst unit comprises a soot blowing member, a support member and a catalyst layer distributed in sequence along the preset flue gas flow direction, the support member is fixed to the wall of the reactor body, the catalyst layer is supported on the support member, and the soot blowing outlet of the soot blowing member faces the catalyst layer.

[0020] By adopting the technical scheme, as a structural example, the catalyst assembly is formed by the hierarchical arrangement of the multiple layers of catalyst units along the preset flue gas flow direction.

[0021] As another structural example, each layer of catalyst unit independently comprises a soot blowing member, a support member and a catalyst layer distributed in sequence along the preset flue gas flow direction, the soot blowing member can be selected from existing devices with blowing function, for example, a pulse cleaner that can output pulse gas and the like. The soot blowing member can blow and remove the dust on the bottom surface of the catalyst layer.

[0022] Preferably, the reactor body is provided with at least one ash outlet corresponding to the catalyst unit, and the ash inlet of the ash removal device is in communication with the ash outlet.

[0023] By adopting the technical scheme, as a structural example, the ash outlet and the ash removal device are arranged so that the dust after being blown and removed by the ash blowing device is settled near the ash outlet by gravity and then is discharged to the outside through the ash removal device.

[0024] Preferably, the system further comprises a bypass flue and an adjusting valve, and the adjusting valve is arranged on the bypass flue, and two ends of the bypass flue are in one-to-one correspondence and communication with the flue gas inlet and the flue gas outlet, respectively.

[0025] By adopting the technical scheme, as a structural example, the bypass flue is additionally arranged, and the adjusting valve is arranged on the bypass flue, so that the flue switching of flue gas can be realized according to actual application requirements, the independent maintenance of the reactor is met, and the external desulfurization and SCR denitration reactor are not affected. When the reactor is put into operation, the adjusting valve on the bypass flue can also control the amount of flue gas entering the reactor, so as to control the temperature of the inlet of the external SCR denitration reactor (the inlet of the SCR denitration reactor is in communication with the flue gas outlet).

[0026] In the second aspect, the application provides a flue gas desulfurization and denitration system, which adopts the following technical scheme:

[0027] The flue gas desulfurization and denitration system comprises a denitration heat exchanger, an SCR denitration reactor and the reactor for removing carbon monoxide in flue gas, the flue gas inlet is in communication with the outlet of the denitration heat exchanger, and the flue gas outlet is in communication with the inlet of the SCR denitration reactor.

[0028] By adopting the technical scheme, the reactor for removing carbon monoxide in flue gas in the application is applied to the flue gas desulfurization and denitration system, the flue gas inlet is in communication with the outlet of the denitration heat exchanger, that is, the desulfurized flue gas heated by the denitration heat exchanger enters the reactor body through the flue gas inlet, and after reaction of the catalyst assembly, the flue gas flows to the SCR denitration reactor through the flue gas outlet. Further, a denitration heating device is usually additionally arranged, and after the flue gas flows out of the flue gas outlet, the flue gas is first connected to the denitration heating device to be heated to a preset temperature, and then is connected to the SCR denitration reactor.

[0029] As another structural example, one open end of the bypass flue is connected to a pipeline in communication with the flue gas inlet and the denitration heat exchanger, and the other open end of the bypass flue is connected to a pipeline in communication with the flue gas outlet and the SCR denitration reactor or the denitration heating device, so as to realize the switching of the flue gas channel and the regulation of the amount of flue gas.

[0030] In summary, the application has at least the following beneficial effects:

[0031] The reactor for removing carbon monoxide in flue gas of the application can realize better airflow uniform flow effect through the cooperation design of the first flow guide, the second flow guide and the flow uniformizer, thereby optimizing and improving the catalytic reaction efficiency of the reactor, and further improving the CO removal efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic view of the reactor for removing carbon monoxide in flue gas of the embodiment of the application.

[0033] REFERENCE NUMERALS:

[0034] 1, reactor body; 11, flue gas inlet; 12, flue gas outlet; 13, ash discharge port; 14, maintenance opening; 15, catalytic assembly mounting port;

[0035] 2, catalyst unit; 21, ash blowing piece; 22, support piece; 23, catalyst layer;

[0036] 3, first flow guide; 4, second flow guide; 5, flow uniformizer; 6, flow resistance piece; 7, regulating valve; 8, bypass flue; 9, third flow guide;

[0037] 10, ash blowing piece; 20, denitration heat exchanger; 30, SCR denitration reactor; 40, denitration heating device. DETAILED DESCRIPTION

[0038] Although the present application can be readily implemented in a variety of forms, it is to be understood that only some of the specific embodiments thereof are to be described in detail herein with the understanding that these embodiments are to be considered in all respects only as illustrative, and not restrictive, in nature.

[0039] Therefore, one feature indicated in the specification will be used to explain one feature of one embodiment of the present application, and it is not implied that each embodiment of the present application must have the explained feature. In addition, it should be noted that the specification describes many features. Although certain features can be combined together to show possible system designs, these features can also be used in other combinations that are not explicitly described. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0040] In the embodiments shown in the drawings, the indications of direction, such as up, down, left, right, front and back, are used to explain the structure and movement of various elements of the present application, and are not absolute but relative. When these elements are in the position shown in the drawings, these indications are appropriate. If the position of these elements changes, the indications of direction will also change accordingly.

[0041] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0042] Example 1

[0043] According to one embodiment shown in this example, the construction can be referred to as [example]. Figure 1 Throughout this view, the same reference numerals denote corresponding components. It should be understood that the reactor for removing carbon monoxide from flue gas according to this application can be used for the purification of all CO-containing flue gas.

[0044] like Figure 1 As shown, the reactor for removing carbon monoxide from flue gas in this embodiment includes: reactor body 1, catalytic component, first flow guide 3, second flow guide 4, flow equalization component 5, flow obstruction component 6, regulating valve 7 (3 shown), ash discharge component 10 (4 shown), and bypass flue 8.

[0045] The reactor body 1 is a cavity structure, and the catalyst assembly, the first flow guide 3, the second flow guide 4, the flow equalization component 5, and the flow obstruction component 6 are all located inside the reactor body 1. The walls of the reactor body 1 are respectively provided with a flue gas inlet 11, a flue gas outlet 12, an inspection port 14, a catalyst assembly installation port 15, and multiple ash discharge ports 13 (four are shown in the figure).

[0046] The flue gas inlet 11 and the flue gas outlet 12 are respectively along the preset flue gas flow direction ( Figure 1 Set the direction of the middle arrow (i.e., from bottom to top) sequentially. Figure 1 The reactor body 1 shown has a boat-shaped design with a large angle between its flue gas inlet 11 and outlet 12. The flue gas inlet 11 is located at the lower part of the reactor body 1, and the flue gas outlet 12 is located at the upper part. Flue gas flows into the reactor body 1 from bottom to top and is discharged. Regulating valves 7 are provided near both the flue gas inlet 11 and the outlet 12. In this embodiment, the regulating valves 7 can be existing gas regulating valves, such as damper valves.

[0047] The catalytic assembly is arranged in the reactor body 1, and the catalytic assembly comprises a catalytic unit 2 in a hierarchical structure and at least two layers (two layers are shown in the figure). The at least two layers of catalytic units 2 are arranged respectively and sequentially in a bottom-to-top direction. Each catalytic unit 2 independently comprises, sequentially in the bottom-to-top direction, a soot blowing piece 21, a support piece 22 and a catalyst layer 23. The support piece 22 is fixedly arranged on the wall of the reactor body 1, the catalyst layer 23 is supported on the support piece 22, and the soot blowing outlet of the soot blowing piece 21 faces the catalyst layer 23. In the embodiment, the soot blowing piece 21 is selected as an existing pulse cleaner. The pulse cleaner is arranged below the support piece, the nozzle outlet of the pulse cleaner faces the bottom surface of the catalyst layer, and pulse gas is output to clean the dust on the bottom surface of the catalyst layer. The material of the catalyst layer 23 is selected as an existing catalyst that can be used for catalytically oxidizing carbon monoxide into carbon dioxide, for example, a non-noble metal (such as Cu, Mn, Co, etc. oxide) and noble metal (such as Pt, Pd, Au, etc.) oxidation catalyst, and the like. The support piece 22 can adopt an existing support. The type, strength, size and other parameters of the support are determined according to actual conditions, and the support can realize the stable support of the catalyst layer 23.

[0048] The access opening 14 is determined according to the overall structure of the reactor body 1 and the distribution position of the catalytic unit 2, and the catalytic assembly mounting opening 15 is determined according to the distribution position of the catalytic unit 2. As shown in Figure 1 , each layer of catalytic unit 2 is provided with one access opening 14 and one catalytic assembly mounting opening 15. The access opening 14 is arranged above the catalyst layer 23, and the catalytic assembly mounting opening 15 is arranged on the side of the catalyst layer 23. In addition, an access opening 14 is also arranged near the flue gas inlet 11 for convenient maintenance and repair.

[0049] The first flow guide 3 is in a blade structure and is a plurality of (three are shown in the figure). The plurality of first flow guides 3 are uniformly spaced and have the same inclination angle. The first flow guide 3 is arranged near the flue gas inlet 11, and the flow direction of the first flow guide 3 extends along the flue gas flow direction.

[0050] The second flow guide 4 is in a blade structure and is a plurality of (three are shown in the figure). The plurality of second flow guides 4 are uniformly spaced and are bent along the flue gas flow direction. The plurality of second flow guides 4 have the same bending angle. The second flow guide 4 is arranged near the flue gas outlet 12. Referring to Figure 1 , in the embodiment, a third flow guide 9 is further arranged between the second flow guide 4 and the uppermost catalytic unit 2. The third flow guide 9 is in a blade structure and is a plurality of (three are shown in the figure). The plurality of third flow guides 9 are uniformly spaced and are bent along the flue gas flow direction. The plurality of third flow guides 9 have the same bending angle. The third flow guide 9 is used to accelerate the flow of the reacted flue gas out of the reactor body 1.

[0051] The flow equalizing member 5 is arranged between the first flow guiding member 3 and the catalytic assembly. In this embodiment, the flow equalizing member 5 is a grid structure, and the spacing of each partition plate in the grid structure is the same, and each partition plate is arranged vertically along the direction from bottom to top.

[0052] The flow resisting member 6 is a plate structure and is in a plurality (5 in the figure), and is arranged on the wall of the reactor body 1 (at a position between the flue gas inlet 11 and the flow equalizing member 5). The extending direction of the plate structure of the flow resisting member 6 has an included angle with the flue gas flow direction, and hinders the flue gas flow speed.

[0053] The four dust discharge ports 13 are arranged on the wall of the reactor body 1 (at a position between the flue gas inlet 11 and the flow equalizing member 5), and the dust discharge port 13 is arranged opposite to the catalyst unit 2, and the four dust discharge ports 13 are uniformly spaced. The dust inlet of the four dust discharge members 10 is in one-to-one communication with the four dust discharge ports 13, and the accumulated dust is discharged to the outside through the dust discharge member 10. The dust discharge member 10 can be selected as a common material receiving bin, and the figure shows a funnel structure with a wide upper end and a narrow lower end.

[0054] The two ends of the bypass flue 8 are respectively arranged in one-to-one correspondence and communication with the flue gas inlet 11 and the flue gas outlet 12, and the bypass flue 8 is also provided with an adjusting valve 7. The structure of the adjusting valve 7 is the same as that of the adjusting valve 7 arranged near the flue gas inlet 11 and the flue gas outlet 12. Therefore, when the reactor of this embodiment is in operation, the amount of flue gas entering the flue gas inlet 11 can be adjusted through the adjusting valve 7 on the bypass flue 8, so as to control the temperature of the inlet of the SCR denitration reactor 30 communicated with the flue gas outlet 12. In addition, when the reactor of this embodiment is applied to a flue gas desulfurization and denitration system, the adjusting valves 7 arranged near the flue gas inlet 11 and the flue gas outlet 12, and the adjusting valve 7 on the bypass flue 8 can realize the switching of the flue gas, so as to meet the independent maintenance of the reactor without affecting the operation of the denitration heat exchanger 20 and the SCR denitration reactor 30.

[0055] The flue gas desulfurization and denitration system of this embodiment includes the denitration heat exchanger 20, the SCR denitration reactor 30 and the above-mentioned reactor for removing carbon monoxide in flue gas. The flue gas inlet 11 is in communication with the outlet of the denitration heat exchanger 20, and the flue gas outlet 12 is in communication with the inlet of the SCR denitration reactor 30. After the flue gas is desulfurized, it is heated by the denitration heat exchanger 20, enters the reactor body 1 through the flue gas inlet 11, and then releases temperature by oxidation reaction in the reactor body 1, and then is discharged from the flue gas outlet 12 and enters the SCR denitration reactor 30.

[0056] In this embodiment, the flue gas outlet 12 is in communication with the inlet of the SCR denitration reactor 30 through the denitration heating device 40. One open end of the bypass flue 8 is connected to the pipeline in communication with the flue gas inlet 11 and the denitration heat exchanger 20, and the other open end of the bypass flue 8 is connected to the pipeline in communication with the flue gas outlet 12 and the denitration heating device 40.

[0057] Based on the above structural description, in this embodiment, the flue gas is heated after desulfurization through the denitration heat exchanger 20, then enters the reactor body 1 from the bottom to the top through the flue gas inlet 11, flows to the flow uniformizing member 5 through the first flow guiding member 3, and slows down through the flow resisting member 6. The flue gas flows through the flow uniformizing member 5, and then flows to the catalytic assembly after the flue gas is distributed uniformly through the flow uniformizing member 5. The flue gas enters the multiple layers of catalyst units 2 from the bottom to the top, and is catalyzed by the catalyst layers 23. The flue gas after oxidation removal through the catalyst layers 23 is discharged from the flue gas outlet 12 of the reactor body 1, and then enters the denitration heating device 40 for heating, and then enters the SCR denitration reactor 30 uniformly.

[0058] The reactor for removing carbon monoxide in flue gas in this embodiment is provided with a bypass flue 8, and adjusting valves 7 for shutting off and adjusting are arranged on the flue gas inlet 11, the flue gas outlet 12 and the bypass flue 8, so that the reactor can be independently switched for maintenance. The flue gas flows from the bottom to the top in the reactor body 1, and the dust adsorbed by the catalyst layers 23 is removed by the soot blowing member 21 on the lower surface of the catalyst layers 23 and the gravity sedimentation of the dust, and the dust is collected and discharged through the ash removal member 10 arranged at the bottom. The first flow guiding member 3, the second flow guiding member 4, the third flow guiding member 9, the flow uniformizing member 5 and the flow resisting member 6 for uniform distribution of air flow are arranged near the flue gas inlet 11 and the flue gas outlet 12, so that the air flow is uniformly distributed, and the catalytic reaction efficiency is improved.

[0059] This specific embodiment is only an explanation of the present application, and is not a limitation of the present application. Those skilled in the art can make modifications to the present embodiment without creative contribution after reading the present specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A reactor for removing carbon monoxide from flue gas, comprising a reactor body and a catalytic assembly, wherein the reactor body is provided with a flue gas inlet and a flue gas outlet in sequence along a preset flue gas flow direction respectively, and the catalytic assembly is arranged in the reactor body, characterized in that, The first flow guide is arranged near the flue gas inlet, the second flow guide is arranged near the flue gas outlet, and the flow equalizer is arranged between the first flow guide and the catalytic component.

2. The reactor for removing carbon monoxide from flue gas according to claim 1, wherein The number of the first flow guide and the second flow guide is at least two, the first flow guide and the second flow guide are plate structures, the at least two first flow guides are arranged at intervals, the at least two second flow guides are arranged at intervals, and the angle between adjacent two first flow guides is the same or different, and the angle between adjacent two second flow guides is the same or different.

3. A reactor for removing carbon monoxide from flue gas according to claim 1 or 2, characterised in that, The flow equalizer is a grid structure or a honeycomb structure.

4. The reactor for removing carbon monoxide from flue gas according to claim 1, wherein The reactor further comprises a flow resistor or an adjusting valve, the flow resistor is arranged between the flue gas inlet and the flow equalizer and is a plate structure, the plate structure of the flow resistor has an angle between the extension direction and the preset flue gas flow direction, and the adjusting valve is arranged near at least one of the flue gas inlet and the flue gas outlet.

5. The reactor for removing carbon monoxide from flue gas according to claim 1, wherein The reactor body is provided with an inspection opening and a catalytic component mounting opening at a preset position.

6. The reactor for removing carbon monoxide from flue gas according to claim 1, wherein The catalytic component comprises at least two layers of catalyst units arranged in a hierarchical structure.

7. The reactor for removing carbon monoxide from flue gas according to claim 6, wherein The catalyst unit comprises a soot blower, a support and a catalyst layer arranged in sequence along the preset flue gas flow direction, the support is fixed to the wall of the reactor body, the catalyst layer is supported on the support, and the soot blowing outlet of the soot blower faces the catalyst layer.

8. The reactor for removing carbon monoxide from flue gas according to claim 7, wherein The reactor further comprises at least one ash discharging device, the reactor body is provided with at least one ash discharging opening corresponding to the catalyst unit between the flue gas inlet and the flow equalizer, and the ash inlet of the ash discharging device is communicated with the ash discharging opening.

9. The reactor for removing carbon monoxide from flue gas according to claim 1, wherein The reactor further comprises a bypass flue and an adjusting valve, the adjusting valve is arranged on the bypass flue, and the two ends of the bypass flue are respectively and correspondingly communicated with the flue gas inlet and the flue gas outlet.

10. A flue gas desulfurization and denitrification system, characterized by, The reactor comprises a denitration heat exchanger, an SCR denitration reactor and the reactor for removing carbon monoxide in flue gas according to any one of claims 1-9, the flue gas inlet is communicated with the outlet of the denitration heat exchanger, and the flue gas outlet is communicated with the inlet of the SCR denitration reactor.

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