Flue gas treatment device for denitration, CO removal and reaction waste heat recovery

Abstract

The invention relates to the technical field of flue gas treatment, and provides a flue gas treatment device for denitration, CO removal and reaction waste heat recovery at the same time, the flue gas treatment device comprises a denitration box used for flue gas treatment and deoxidation equipment, the denitration box comprises a box body and a partition plate fixed in the box body and used for partitioning the box body, according to the technical scheme, the partition plate is arranged in the box body, and the vent grooves are formed in the upper end and the lower end of the partition plate and form vertical reciprocating air channels between the box body and the partition plate, so that firstly, by arranging the vertical reciprocating air channels, the length of an airflow channel can be guaranteed while the occupied space is controlled, and therefore the denitration and heat exchange effects are guaranteed; a catalyst solution and flue gas can be fully mixed through the arranged spraying part, the treatment effect is guaranteed, then efficient heat exchange of the heat exchange part and flow guide of the conveying part are matched, finally heat generated by flue gas treatment is recycled, the conveying part further uses flowing of the catalyst solution as a power source, power utilization is sufficient, and the energy consumption is reduced. And the whole device is greener.

Description

Technical Field

[0001] The present invention relates to the field of flue gas treatment, and more specifically, to a flue gas treatment device capable of removing NOx, CO and recovering reaction waste heat simultaneously. Background Art

[0002] Flue gas treatment equipment is used to purify and treat flue gas generated in industry or life. Its core purpose is to reduce the emission of harmful substances and protect the environment and human health. Flue gas treatment equipment includes dust removal equipment, denitrification equipment, denitrification equipment, adsorption equipment, absorption equipment, and catalytic combustion equipment;

[0003] Among them, flue gas denitrification technologies mainly include dry method (selective catalytic reduction flue gas denitrification, selective non-catalytic reduction denitrification) and wet method. Compared with wet flue gas denitrification technology, the main advantages of dry flue gas denitrification technology are: low basic investment, simple equipment and process, high efficiency of removing NOX, no wastewater and waste treatment, and not easy to cause secondary pollution; common carbon dioxide capture technologies include chemical absorption, physical adsorption, membrane separation, and redox method, which remove carbon dioxide contained in flue gas in different ways to ultimately achieve the purpose of purifying flue gas;

[0004] In many industrial flue gas treatments, denitrification usually takes precedence over carbon monoxide removal, because desulfurization usually requires higher temperatures (300-400°C), while carbon monoxide removal requires lower temperatures for catalytic oxidation (200-300°C). Therefore, denitrification first can utilize the appropriate temperature range to create more suitable conditions for subsequent CO removal;

[0005] In the common denitrification process, the sulfur in the flue gas is purified under the action of the catalyst, and its heat is also absorbed by the catalyst. In order to ensure the use temperature of the catalyst, an independent cooling system needs to be set up on the circulation pipeline. First of all, the refrigeration system is costly, and the heat after absorption cannot be recycled, resulting in double waste of resources;

[0006] Secondly, the cooling effect of some denitrification processes is poor. For example, the heat exchange effect is not ideal, the reaction channel is limited, etc. In order to ensure the temperature of subsequent carbon monoxide removal, a cooling system is required to reduce the temperature to the temperature range of carbon monoxide removal through the cooling system. Although it can ensure the progress of the flue gas treatment process, it is costly, the steps are cumbersome, and it is not conducive to the efficient treatment of flue gas.

[0007] In order to solve the above problems, the present application proposes a flue gas treatment device for denitrification, removing CO and recovering reaction waste heat at the same time. Summary of the invention

[0008] The object of the present invention is to provide a flue gas treatment device which can remove CO and recover the waste heat of reaction while denitrifying, and has the characteristics of recycling the heat of denitrification and automatically transmitting the heat.

[0009] The purpose of the present invention can be achieved through the following technical solutions:

[0010] A flue gas treatment device for denitrification, simultaneous removal of CO and recovery of reaction waste heat, comprising a denitrification box and a deoxygenation device for flue gas treatment, wherein the denitrification box comprises a box body and a partition fixed inside the box body to form a partition, and a ventilation groove opened at the upper and lower ends of the partition board to form a vertical reciprocating airway between the box body and the partition board, and further comprising:

[0011] A spray component forming a circulation pipeline in the denitration box circulates and atomizes the catalyst solution to purify sulfur in the flue gas while achieving temperature reduction;

[0012] A heat exchange component is arranged at the position where the spray component stores the catalyst solution, and the heat exchange component realizes heat exchange of the catalyst solution to ensure that the catalyst solution is kept at the working temperature;

[0013] A conveying component movably arranged at one end of the circulation pipeline of the spray component and the heat exchange component, wherein the conveying component utilizes the flow power of the catalyst solution to send out the heat exchanged by the heat exchange component, thereby realizing heat recovery and utilization of flue gas treatment;

[0014] In the above technical scheme, by setting up a vertical reciprocating airway, the length of the airflow channel can be guaranteed while controlling the occupied space, thereby ensuring the denitrification and heat exchange effects. The catalyst solution and the flue gas can be fully mixed through the spray component to ensure the treatment effect. Then, the heat generated by the flue gas treatment can be recovered and utilized in conjunction with the efficient heat exchange of the heat exchange component and the diversion of the conveying component. The conveying component also uses the flow of the catalyst solution as a power source, and the power is fully utilized.

[0015] The top of the box is sealed with a sealing plate, and the sealing plate is respectively provided with an air inlet and an air outlet, and the deoxygenation equipment is provided with a transfer tube connected to the air outlet;

[0016] In the above technical solution, the flue gas is treated in the denitrification box and then flows through the transfer pipe into the deoxygenation equipment for the carbon monoxide treatment process.

[0017] The spray component includes a conical liquid storage tank fixed to the bottom of the box and communicating with the bottom of the box, a filter fixed to the outer side of the box, and a circulation pump. A shunt pipe is fixed to the upper end of the inner part of the box, and a plurality of atomizing nozzles are arranged on the shunt pipe above the center of the reciprocating channel.

[0018] In the above technical solution, the filter can filter the solid matter after the reaction of the catalyst solution and sulfur. The size of the filter can be increased according to the actual frequency and duration of use to ensure the reliability of the catalyst solution circulation operation.

[0019] It also includes a reflux pipe, which consists of three parts. The top end is connected between the shunt pipe and the circulation pump, the middle end is connected between the circulation pump and the filter, the bottom end is connected to the other end of the filter and is located in the conical liquid storage tank, and the bottom opening of the lower end reflux pipe is located at the lower end of the inner side of the conical liquid storage tank;

[0020] In the above technical solution, the reflux pipe refluxes the catalyst solution through a circulating pump and circulates it for atomization to achieve continuous denitrification and cooling. The bottom reflux pipe is located below the heat exchange component and continues to atomize the cooled catalyst solution to cool the catalyst solution more fully.

[0021] The heat exchange component comprises a through groove vertically arranged in the conical liquid storage tank, a vertically arranged inner heat conducting plate is arranged in the through groove, a flow guiding channel is horizontally opened in the conical liquid storage tank, a horizontally arranged outer heat conducting plate is arranged in the flow guiding channel, and a flow divider located outside one end of the flow guiding channel and an output pipe at the other end are arranged at one end of the conical liquid storage tank;

[0022] In the above technical solution, the diverter is connected to the conveying component, and the diverter evenly diffuses the airflow generated by the conveying component to the guide channel. After the airflow passes through the guide channel, it is connected to the outside through the output pipe.

[0023] The inner heat conducting sheet is in contact with the catalyst solution, the two ends of the flow guiding channel are interconnected but not in contact with the inside of the conical liquid storage tank, and the flow guiding channel and the outer heat conducting sheet are in contact with the airflow at the same time;

[0024] In the above technical solution, the inner heat conductive sheet can quickly absorb the heat of the catalyst solution after contacting it, and then conduct it to the guide channel and the outer heat conductive sheet through the conical liquid storage tank, and the heat is taken away and recovered by the airflow in contact with the guide channel and the outer heat conductive sheet.

[0025] The conveying component includes a sealing box fixed on the atomizing nozzle and a power wheel rotatably arranged in the sealing box, as well as an air cavity fixed on the diverter and a fan blade rotating inside the air cavity;

[0026] In the above technical solution, the conveying component uses the power generated by the flow of the catalyst solution to bring out the heat exchanged by the heat exchange component, and then connects to external recycling pipelines, equipment, etc., which has outstanding effects such as high linkage and automatic recovery.

[0027] A bevel gear pair and a gear set are sequentially arranged between the fan blades and the power wheel;

[0028] In the above technical solution, the power of the power wheel is transmitted to the fan blades through the bevel gear pair and the gear set, thereby forming an airflow for transporting heat.

[0029] The power wheel drives the flow of the catalyst solution through the circulation pump to rotate in the sealed box, and then drives the fan blades to rotate through the gear set and the bevel gear pair to generate airflow blowing toward the heat exchange component;

[0030] In the above technical solution, the conveying component utilizes the flow of the catalyst solution and the power wheel to generate power to achieve linkage with the spraying component. The structure is compact and the degree of coordination is high. There is no need to purchase additional driving parts as the driving end of the conveying component, thereby controlling costs.

[0031] The diameters of the upper and lower ends of the air cavity are smaller than the middle part, the fan blades are installed in the middle part, and the top of the air cavity is also provided with air holes;

[0032] In the above technical solution, by placing the fan blades in a larger cavity in the middle, the fan blades can push the airflow to a greater extent after rotation, so as to quickly remove the heat derived from the heat exchange components. The air holes at the top of the air cavity serve as air intakes. In order to achieve better dust prevention effects, filters or shielding members can be set on the air holes.

[0033] Beneficial effects of the present invention:

[0034] The present invention provides a reciprocating airway composed of a box, a partition, and a ventilation groove, and then uses an atomized spraying method to remove the carbon monoxide under the cooperation of a spraying component, so as to ensure the removal effect in a small space, and quickly reduce the flue gas temperature, so that the temperature of the flue gas after denitrification treatment is guaranteed to be within the required temperature for removing carbon monoxide, without the need for a cooling system, thereby reducing costs and increasing efficiency;

[0035] The present invention can efficiently exchange heat with the catalyst solution through the heat exchange component arranged in the conical liquid storage tank, and can quickly absorb the heat of the catalyst solution through the inner heat conductive sheet and then conduct it to the guide channel and the outer heat conductive sheet through the conical liquid storage tank, so as to achieve efficient heat dissipation during the circulation of the catalyst solution;

[0036] The present invention installs a sealing box and a power wheel on a reflux pipe, uses the power of a circulating pump to drive the catalyst solution to drive the fan blades, and then the fan blades drive the airflow to pass through the guide channel and the external heat conducting plate, thereby quickly bringing out the heat after heat exchange, and the heat brought out is discharged through an output pipe. The output pipe can be connected to external pipelines, valves, energy storage devices, etc., and can also be connected to a heating system, so as to recycle the heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 It is a structural schematic diagram of the main view of the present invention;

[0039] Figure 2 for Figure 1 A schematic diagram of the structure from the rear;

[0040] Figure 3 for Figure 1 A schematic diagram of the structure of the middle denitrification box, half section from the main view;

[0041] Figure 4 for Figure 1 Schematic diagram of the structure of the air flow channel inside the middle denitrification box;

[0042] Figure 5 It is a schematic structural diagram of the sealing box and the power wheel in the present invention;

[0043] Figure 6 It is a schematic diagram of the structure of power transmission between the power wheel and the fan blades in the present invention;

[0044] Figure 7 It is a structural schematic diagram of a partial cutaway of a conical liquid storage tank and the distribution of heat conducting plates in the present invention;

[0045] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0046] In the figure: 1. Denitrification box; 11. Box body; 12. Partition; 13. Ventilation groove; 14. Sealing plate; 15. Air inlet; 16. Air outlet; 2. Deoxygenation equipment; 21. Transfer pipe; 3. Spray component; 31. Conical liquid storage tank; 32. Filter; 33. Circulation pump; 34. Diverter pipe; 35. Atomizing nozzle; 36. Return pipe; 4. Heat exchange component; 41. Inner heat conduction plate; 42. Guide channel; 43. Outer heat conduction plate; 44. Diverter; 45. Output pipe; 5. Conveying component; 51. Sealing box; 52. Power wheel; 53. Air cavity; 54. Fan blade; 55. Conical gear pair; 56. Gear set. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0048] like Figure 1 - Figure 7 As shown:

[0049] This embodiment provides a flue gas treatment device for denitrification, simultaneous removal of CO and recovery of reaction waste heat, including a denitrification box 1 and a deoxygenation device 2 for flue gas treatment, the denitrification box 1 including a box body 11 and a partition 12 fixed inside the box body 11 and forming a partition, and a ventilation groove 13 opened at the upper and lower ends of the partition 12 and forming a vertical reciprocating airway between the box body 11 and the partition 12, and also including:

[0050] A spray component 3 of a circulation pipeline is formed in the denitration box 1, and the spray component 3 circulates and atomizes the catalyst solution to purify sulfur in the flue gas while achieving temperature reduction;

[0051] A heat exchange component 4 is provided at the position where the spray component 3 stores the catalyst solution, and the heat exchange component 4 realizes heat exchange of the catalyst solution to ensure that the catalyst solution is kept at the working temperature;

[0052] The conveying component 5 is movably arranged at one end of the circulation pipeline of the spraying component 3 and the heat exchange component 4. The conveying component 5 uses the flow power of the catalyst solution to send out the heat exchanged by the heat exchange component 4, thereby realizing heat recovery and utilization of flue gas treatment.

[0053] Specifically, after the flue gas enters the denitrification box 1, it flows back and forth along its channel. During this process, the spray component 3 forms a spray that reacts with the flue gas to perform denitrification. The catalyst solution absorbs the heat of the flue gas, and the catalyst heat is conducted outward by the heat exchange component 4. Then, a directional airflow is formed by the conveying component 5 driven by the spray component 3 to recycle the gas with heat in the heat exchange component 4.

[0054] As an embodiment of a flue gas treatment device for denitration, simultaneous removal of CO and recovery of reaction waste heat of the present invention, a sealing plate 14 is sealed on the top of the box body 11, and an air inlet 15 and an air outlet 16 are respectively provided on the sealing plate 14, and a transfer pipe 21 connected to the air outlet 16 is provided on the deoxygenation device 2;

[0055] Specifically, Figure 4As shown, smoke enters from the air inlet 15 and flows downward, moves upward after passing through the ventilation groove 13, then flows downward again through the ventilation groove 13 at the left rear, flows upward and flows out from the air outlet 16. There are three ventilation grooves 13 as shown in the figure, the first one is located on the side below the air inlet 15, the third one is located on the side below the air outlet 16, and the second one is located at the ventilation groove 13 mark as shown in the figure.

[0056] As an embodiment of a flue gas treatment device for denitration, simultaneous removal of CO and recovery of reaction waste heat of the present invention, the spray component 3 includes a conical liquid storage tank 31 fixed to the bottom of the box body 11 and interconnected therewith, a filter 32 fixed to the outer side of the box body 11, and a circulation pump 33. A shunt pipe 34 is fixedly connected to the upper end of the interior of the box body 11, and a plurality of groups of atomizing nozzles 35 located above the center of the reciprocating channel are provided on the shunt pipe 34; and a reflux pipe 36 is also included. The reflux pipe 36 consists of three parts, the uppermost end is connected between the shunt pipe 34 and the circulation pump 33, the middle one is connected between the circulation pump 33 and the filter 32, the lower end is connected to the other end of the filter 32 and is located in the conical liquid storage tank 31, and the bottom opening of the lower end reflux pipe 36 is located at the lower end of the inner side of the conical liquid storage tank 31;

[0057] Specifically, a catalyst solution, which may be a titanium-based or vanadium-based catalyst, is added to the conical liquid storage tank 31. The catalyst liquid level is flush with the top surface of the conical liquid storage tank 31, and the catalyst immerses the internal heat conductive plate 41. When the circulation pump 33 is working, the catalyst solution in the conical liquid storage tank 31 is sucked upward through the reflux pipe 36 at the bottom. The catalyst solution synchronously drives the conveying component 5 to work during the upward flow of the catalyst solution in the reflux pipe 36. The catalyst solution is filtered when it flows through the filter 32, and then flows through the diversion pipe 34 and is sprayed out through the atomizing nozzle 35. The catalyst solution sprayed by the atomizing nozzle 35 diffuses in the reciprocating channel inside the denitrification box 1, thereby fully reacting with the internal flue gas.

[0058] As an embodiment of a flue gas treatment device for denitration and simultaneous removal of CO and recovery of reaction waste heat of the present invention, the heat exchange component 4 includes a through groove vertically arranged in a conical liquid storage tank 31, a vertically arranged inner heat conducting plate 41 is arranged in the through groove, a flow guide channel 42 is horizontally opened in the conical liquid storage tank 31, a horizontally arranged outer heat conducting plate 43 is arranged in the flow guide channel 42, a flow divider 44 located outside one end of the flow guide channel 42 and an output pipe 45 at the other end are arranged at one end of the conical liquid storage tank 31; the inner heat conducting plate 41 is in contact with the catalyst solution, the two ends of the flow guide channel 42 are interconnected but not in contact with the inside of the conical liquid storage tank 31, and the flow guide channel 42 and the outer heat conducting plate 43 are in contact with the airflow at the same time;

[0059] Specifically, the catalyst solution sprayed by the spray component 3 and heated by the flue gas drips onto the upper end of the conical liquid storage tank 31. At this time, the circulating pump 33 is in working state and will absorb the catalyst solution at the bottom, and then the catalyst solution at the top moves downward. In this process, the catalyst solution contacts the inner heat conductive plate 41, and the inner heat conductive plate 41 absorbs its heat and then guides it to the guide channel 42 and the outer heat conductive plate 43 through the conical liquid storage tank 31. The airflow formed by the conveying component 5 will make the hot gas flow along the diverter 44 and the guide channel 42 and then be discharged from the output pipe 45.

[0060] As an embodiment of a flue gas treatment device for denitration, simultaneous removal of CO and recovery of reaction waste heat of the present invention, the conveying component 5 includes a sealing box 51 fixed on the atomizing nozzle 35 and a power wheel 52 rotatably arranged in the sealing box 51, as well as an air cavity 53 fixed on the diverter 44 and a fan blade 54 rotating inside the air cavity 53; a bevel gear pair 55 and a gear set 56 are sequentially arranged between the fan blade 54 and the power wheel 52; the power wheel 52 drives the flow of the catalyst solution to rotate in the sealing box 51 through the circulation pump 33, and then drives the fan blade 54 to rotate through the gear set 56 and the bevel gear pair 55 and generates an air flow blowing toward the heat exchange component 4; the diameters of the upper and lower ends of the air cavity 53 are smaller than the middle part, the fan blade 54 is installed in the middle part, and an air hole is also opened at the top of the air cavity 53;

[0061] Specifically, the power wheel 52 is driven by the flow of the catalyst solution to rotate inside the sealing box 51, and under the action of the gear set 56 and the bevel gear pair 55, it drives the fan blades 54 to rotate inside the air cavity 53. After the fan blades 54 rotate, they drive the external air flow to enter from the through hole at the upper end of the air cavity 53. The air flow enters the diverter 44 and passes through the guide channel 42 to discharge the heat conducted by the heat exchange component 4 from the output pipe 45.

[0062] It can be understood that, firstly, by setting up a vertical reciprocating air duct, the length of the airflow channel can be guaranteed while controlling the occupied space, thereby ensuring the denitrification and heat exchange effects. Secondly, the catalyst solution and the flue gas can be fully mixed through the spray component to ensure the treatment effect. Then, with the efficient heat exchange of the heat exchange component and the diversion of the conveying component, the heat generated by the flue gas treatment can be finally recovered and utilized. The conveying component also uses the flow of the catalyst solution as a power source, and the power is fully utilized, making the overall device more green.

[0063] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicate orientation or positional relationship, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0064] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flue gas treatment device for denitrification, removal of CO and recovery of reaction waste heat, comprising a denitrification box and a deoxygenation device for flue gas treatment, characterized in that: The denitration box includes a box body and a partition fixed inside the box body to form a partition, and a ventilation groove opened at the upper and lower ends of the partition to form a vertical reciprocating airway between the box body and the partition, and also includes: A spray component forming a circulation pipeline in the denitration box circulates and atomizes the catalyst solution to purify sulfur in the flue gas while achieving temperature reduction; A heat exchange component is arranged at the position where the spray component stores the catalyst solution, and the heat exchange component realizes heat exchange of the catalyst solution to ensure that the catalyst solution is kept at the working temperature; The conveying component is movably arranged at one end of the circulation pipeline of the spray component and the heat exchange component. The conveying component uses the flow power of the catalyst solution to send out the heat exchanged by the heat exchange component, thereby realizing heat recovery and utilization of flue gas treatment.

2. A flue gas treatment device for denitrification, simultaneous removal of CO and recovery of reaction waste heat according to claim 1, characterized in that: The top of the box is sealed with a sealing plate, and an air inlet and an air outlet are respectively arranged on the sealing plate. The deoxygenation equipment is provided with a transfer tube connected with the air outlet.

3. A flue gas treatment device for denitrification, simultaneous removal of CO and recovery of reaction waste heat according to claim 1, characterized in that: The spray component includes a conical liquid storage tank fixed at the bottom of the box and communicated with it, a filter fixed to the outer side of the box, and a circulation pump. A diverter pipe is fixedly connected to the upper end of the inner part of the box, and a plurality of atomizing nozzles are arranged on the diverter pipe and located above the center of the reciprocating channel.

4. A flue gas treatment device for denitrification and simultaneous removal of CO and recovery of reaction waste heat according to claim 3, characterized in that: It also includes a return pipe, which consists of three parts. The uppermost end is connected between the shunt pipe and the circulation pump, the middle end is connected between the circulation pump and the filter, and the lower end is connected to the other end of the filter and is located in the conical liquid storage tank (31). The bottom opening of the lower end return pipe (36) is located at the lower end of the inner side of the conical liquid storage tank (31).

5. The flue gas treatment device for denitrification, simultaneous removal of CO and recovery of reaction waste heat according to claim 3 is characterized in that: The heat exchange component (4) comprises a through groove vertically arranged in the conical liquid storage tank (31), a vertically arranged inner heat conducting plate (41) is arranged in the through groove, a flow guiding channel (42) is horizontally opened in the conical liquid storage tank (31), a horizontally arranged outer heat conducting plate (43) is arranged in the flow guiding channel (42), and a flow divider (44) located outside one end of the flow guiding channel (42) and an output pipe (45) at the other end are arranged at one end of the conical liquid storage tank (31).

6. A flue gas treatment device for denitrification, simultaneous removal of CO and recovery of reaction waste heat according to claim 5, characterized in that: The inner heat conducting plate (41) is in contact with the catalyst solution, the two ends of the flow guiding channel (42) are interconnected but are not the same as the interior of the conical liquid storage tank (31), and the flow guiding channel (42) and the outer heat conducting plate (43) are in contact with the airflow at the same time.

7. A flue gas treatment device for denitrification, simultaneous removal of CO and recovery of reaction waste heat according to claim 5, characterized in that: The conveying component (5) comprises a sealing box (51) fixed on the atomizing nozzle (35) and a power wheel (52) rotatably arranged in the sealing box (51), as well as an air cavity (53) fixed on the diverter (44) and a fan blade (54) rotatably inside the air cavity (53).

8. A flue gas treatment device for denitrification, simultaneous removal of CO and recovery of reaction waste heat according to claim 7, characterized in that: A bevel gear pair (55) and a gear set (56) are sequentially arranged between the fan blades (54) and the power wheel (52).

9. A flue gas treatment device for denitrification and simultaneous removal of CO and recovery of reaction waste heat according to claim 8, characterized in that: The power wheel (52) drives the flow of the catalyst solution through the circulation pump (33) to rotate in the sealing box (51), and then drives the fan blades (54) to rotate through the gear set (56) and the bevel gear pair (55) to generate an airflow blowing toward the heat exchange component (4).

10. A flue gas treatment device for denitrification, simultaneous removal of CO and recovery of reaction waste heat according to claim 7, characterized in that: The diameters of the upper and lower ends of the air cavity are smaller than the middle part, the fan blades are installed in the middle part, and air holes are also opened on the top of the air cavity.

Images