Flue gas denitration tower and operation method thereof

Abstract

The invention relates to a flue gas denitration tower, which comprises: a processing main tank body having a cylindrical shape, the main tank body being provided with a gas inlet and a gas outlet, the gas inlet being used for receiving flue gas; the inner wall cleaning assembly comprises a scraping plate and a scraping plate driving device, the scraping plate extends downwards from the upper end of the main tank body along the axis of the main tank body and is suitable for being in contact with the inner wall of the main tank body, and the scraping plate driving device is used for driving the scraping plate to rotate along the inner wall of the main tank body; the denitration tank is arranged below the main tank body, and a catalyst is suitable for being placed in the denitration tank. The invention also relates to an operation method of the flue gas denitration tower.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the field of flue gas denitrification, and in particular to a flue gas denitrification tower and an operating method of the flue gas denitrification tower. Background Art

[0002] Sludge incineration is a common sludge disposal method. Compared with sludge landfill and composting disposal, it can recycle the energy in the sludge for heating or power generation, minimize the volume of sludge, save land resources, and kill pathogens in the sludge. The denitrification tower is an empty tower high-pressure spray. Under the atomization action of the nozzle, the denitrification agent is split into countless small-diameter droplets at high pressure. The total surface area is expanded thousands of times, allowing the gas and liquid to fully contact. The larger the gas-liquid contact area, the higher the two-phase mass transfer reaction efficiency.

[0003] In the existing sludge co-combustion process, a denitrification tower is needed to denitrify the flue gas in the co-combustion process. This results in a problem that during the long denitrification process, a small amount of impurities will be contained in the flue gas, and these impurities will adhere to the inner wall of the tank, making it difficult to clean the impurities, thereby increasing the workload. Summary of the invention

[0004] The present disclosure is proposed to solve or alleviate at least one aspect of the problems in the prior art.

[0005] The technical problem to be solved by the present disclosure is to overcome the deficiencies of the prior art and to provide a flue gas denitrification tower and an operating method thereof that can overcome the above problems or at least partially solve the above problems.

[0006] The embodiment of the present disclosure relates to a flue gas denitrification tower, comprising:

[0007] Processing the main tank body, which has a cylindrical shape, and the main tank body is provided with an air inlet and an air outlet, and the air inlet is used to receive the flue gas;

[0008] An inner wall cleaning assembly comprises a scraper and a scraper driving device, wherein the scraper extends downward from the upper end of the main tank body along the axis of the main tank body and is suitable for contacting the inner wall of the main tank body, and the scraper driving device is used to drive the scraper to rotate along the inner wall of the main tank body;

[0009] The denitration tank is arranged below the main tank body and is suitable for placing a catalyst inside.

[0010] Optionally, the flue gas denitrification tower also includes a centralized denitrification component, which is arranged below the inner wall cleaning component and includes: a mounting ring, and an axial flow fan device installed on the mounting ring, wherein: the mounting ring is fixed to the inner wall of the lower end of the main tank body, and the axial flow fan device is suitable for concentrating the flue gas toward the denitrification tank below the axial flow fan device.

[0011] According to another aspect of an embodiment of the present disclosure, a method for operating a flue gas denitrification tower is provided, comprising the steps of:

[0012] The scraper is driven to rotate along the inner wall of the main tank body to clean the inner wall of the main tank body.

[0013] Optionally, the method further comprises the steps of:

[0014] The flue gas generated by the sludge combustion is denitrated by the catalyst in the denitration tank through the conveying device;

[0015] The wind wheel is driven to rotate, and the flue gas above the wind wheel is collected and transported to the catalyst for denitrification reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic perspective view of the overall structure of a flue gas denitrification tower according to an exemplary embodiment of the present disclosure;

[0017] Figure 2 yes Figure 1 A schematic three-dimensional diagram of the cross-sectional structure of a flue gas denitrification tower;

[0018] Figure 3 is a schematic perspective view of a centralized denitration assembly structure according to an exemplary embodiment of the present disclosure;

[0019] Figure 4 It is a schematic structural stereoscopic diagram of an inner wall cleaning assembly according to an embodiment of the present disclosure.

[0020] In the figure: 1. Processing main tank; 2. Air inlet; 3. Connecting valve; 4. Air outlet; 5. Mounting tank; 6. Denitration tank; 7. Connecting bracket; 8. Bottom tank; 9. Components for centralized denitration; 10. Catalyst; 11. Mounting ring; 12. Inner wall cleaning component; 201. No. 1 annular slide rail; 202. No. 1 gear ring; 203. Slip ring; 204. Motor; 205. Driving gear; 206. Limiting ring; 20 7. Lifting rod; 208. Connecting plate; 209. Top plate; 210. Threaded matching rod; 211. Screw rod; 212. Bottom plate; 213. Scraper; 214. Extension rod; 901. Limit plate; 902. Limit bearing; 903. Wind wheel; 904. No. 2 annular slide rail; 905. No. 2 gear ring; 906. Driven gear; 907. Rotating rod; 908. Driving gear; 909. No. 2 motor. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. The following embodiments are used to illustrate the present disclosure but are not used to limit the scope of the present disclosure.

[0022] The structure of the present disclosure is described in detail below with reference to the accompanying drawings.

[0023] like Figures 1 to 4 As shown, a flue gas denitrification tower provided by an embodiment of the present disclosure includes a processing main tank (i.e., a main tank body) 1, an inner wall cleaning component 12 and a denitrification tank 6.

[0024] In the present disclosure, the main tank body 1 has a cylindrical shape, and is provided with an air inlet and an air outlet, and the air inlet is used to receive smoke.

[0025] In the present disclosure, the inner wall cleaning assembly 12 includes a scraper 213 and a scraper driving device, wherein the scraper extends downward from the upper end of the main tank body along the axis of the main tank body 1 and is suitable for contacting the inner wall of the main tank body, and the scraper driving device is used to drive the scraper to rotate along the inner wall of the main tank body.

[0026] In the present disclosure, the denitration tank 6 is disposed below the main processing tank 1 and is suitable for placing a catalyst 10 therein.

[0027] In one embodiment of the present disclosure, the scraper driving device includes a scraper circumferential movement driving unit, wherein the scraper circumferential movement driving unit includes a first gear ring (corresponding to Figure 4 203) and a first gear driving unit meshed with the first gear ring to drive the first gear ring to rotate, the first gear ring includes a first gear belt (corresponding to Figure 4 202 in the figure); the scraper 213 is connected to the first gear ring 213 and is suitable for moving circumferentially with the first gear ring 213. More specifically, the scraper circumferential movement driving unit includes a first annular guide rail (corresponding to Figure 4 201) and the first slip ring (corresponding to Figure 4 203), the first annular guide rail is fixedly connected to the upper end of the main tank body 1, the first slip ring cooperates with the first annular guide rail to be suitable for rotating along the first annular guide rail, and the first gear belt 202 is arranged on the first slip ring or the first slip ring constitutes the first gear ring.

[0028] like Figure 4 As shown, the first gear belt 202 is arranged on the upper surface of the first slip ring 203. In an optional embodiment, the first slip ring 203 is arranged in the annular groove of the first annular guide rail 201, or the first slip ring 203 and the first annular guide rail 201 respectively constitute the inner ring and outer ring of the first gear belt bearing.

[0029] like Figure 4 As shown, the first gear driving unit includes a driving gear 205 meshing with the first gear belt 202 , and a first motor 204 driving the driving gear 205 .

[0030] like Figure 4 As shown, the inner wall of the first gear ring 203 is fixedly provided with a plurality of limit portions (corresponding to Figure 4 206), the limiting portion is in the form of a limiting ring or a limiting cylinder, the upper end of the scraper 213 passes through the corresponding limiting portion, the first gear ring 203 rotates to drive the limiting portion to rotate, and the scraper is driven by the limiting portion to move circumferentially.

[0031] The above describes the circumferential drive of the scraper driving device. In a further embodiment, the scraper can also be arranged to move up and down, which is described below.

[0032] When the above-mentioned limiting portion is provided, the scraper driving device further comprises a scraper axial movement driving unit, which is connected to the upper end of the scraper 213 passing through the limiting portion 206 to drive the scraper to move axially along the limiting portion.

[0033] More specifically, Figure 4 As shown, the scraper axial movement driving unit includes a bottom plate 212 and a top plate 209; the bottom plate 212 is fixedly connected to the first annular guide rail 201, and a lifting structure is arranged on the upper side of the bottom plate, and the lifting structure is connected to the top plate 209 to drive the top plate 209 to move up and down along the axial direction of the main tank body 1; the top plate 209 is provided with a branch arm (corresponding to Figure 4 208), the branch arm 208 is connected to the upper end of the corresponding scraper 213. Further, a plurality of branch arms 208 are arranged at equal intervals around the top plate 209, and a plurality of stoppers 206 correspond to the plurality of branch arms 208, respectively, and the upper end of the corresponding scraper 213 passes through the corresponding stoppers 206.

[0034] like Figure 4 As shown, the bottom plate 212 is located below the first annular guide rail 201, and is connected to the edge of the bottom plate 212 and is arranged at equal intervals in the circumferential direction through a plurality of connecting arms (corresponding to Figure 4 214) is connected to the first annular guide rail 201.

[0035] In a more specific example, the lifting structure includes a screw rod 211, a threaded mating rod 210, and a lifting drive (not shown) arranged on the bottom plate, one end of the threaded mating rod 210 is connected to the lower side of the top plate 209, one end of the screw rod 211 is threadedly mated with the other end of the threaded mating rod 210, and the other end of the screw rod 211 is driven to rotate by a lifting drive motor, and the lifting structure is lifted and lowered based on the threaded mating between the screw rod and the threaded mating rod. In an optional embodiment, the lifting structure includes a driving rod driven by a lifting drive motor or hydraulic drive, the upper end of the driving rod is connected to the lower side of the top plate, and the lower end of the driving rod is lifted and lowered by a lifting drive motor or hydraulic drive.

[0036] like Figure 2As shown, the flue gas denitrification tower may also include a centralized denitrification component 9. Figure 2 as well as Figure 3 As shown, the centralized denitrification component 9 is arranged below the inner wall cleaning component 12 and includes: a mounting ring 11, and an axial flow fan device installed on the mounting ring 11, wherein: the mounting ring 11 is fixed to the inner wall of the lower end of the main tank body 1, and the axial flow fan device is suitable for concentrating the flue gas toward the denitrification tank below the axial flow fan device.

[0037] like Figure 3 As shown, the axial flow fan device includes: a limit bearing 902, the limit bearing includes an outer ring as a fixed ring and an inner ring as a rotating ring, the fixed ring is supported or fixed by the mounting ring 11; a fan driving device, including a second gear ring (corresponding to Figure 3 904) and a second gear driving unit meshed with the second gear ring to drive the second gear ring to rotate, the second gear ring includes a second gear belt (corresponding to Figure 3 905); the wind wheel 903 comprises a blade, the upper end of the blade is connected to the rotating ring of the limit bearing 902, the lower end of the blade is connected to the second gear ring 904, and the blade is adapted to move in the circumferential direction with the second gear ring 904.

[0038] like Figure 3 As shown, the mounting ring 11 constitutes a second annular guide rail, the fan driving device includes a second slip ring 904, the second slip ring 904 cooperates with the second annular guide rail to be suitable for rotating along the second annular guide rail, and the second gear belt 905 is arranged on the second slip ring 904 or the second slip ring 904 constitutes the second gear ring.

[0039] like Figure 3 As shown, the second gear belt 905 is arranged on the outer surface of the second slip ring 904, and the second driving gear 908 is meshed with the second gear belt 905. In an optional embodiment, the second slip ring 904 is arranged in the annular groove of the second annular guide rail 11, or the second slip ring 904 and the second annular guide rail 11 respectively constitute the inner ring and outer ring of the second gear belt bearing.

[0040] like Figure 3 As shown, the second motor 909 is fixed on the mounting ring 11 serving as the second annular guide rail 11 for driving the second driving gear 908 .

[0041] In a further embodiment, the flue gas denitrification tower also includes a plurality of rotating rods 907, the upper end of the rotating rod 907 is rotatably matched with the fixing ring of the limit bearing 902, the lower end of the rotating rod 907 is rotatably matched with the mounting ring 11, and the fixing ring of the limit bearing 902 is supported by the mounting ring 11 based on the rotating rod 907; a driven gear 906 is installed in the middle part of the rotating rod 907, and the driven gear 906 is suitable for engaging with the second gear belt 905 to guide the rotation of the second gear belt 905.

[0042] More specifically, in the present disclosure, the centralized denitrification component 9 includes a bearing 902 (i.e., a limit bearing), the bearing 902 is fixedly connected to the lower inner wall of the processing main tank 1, and a wind wheel 903 is fixedly connected inside the bearing 902. Optionally, a limit plate 901 (i.e., an annular guide plate) is fixedly connected to the upper end of the wind wheel 903; the inner wall cleaning component 12 includes a No. 1 annular slide rail 201 (i.e., a first annular guide rail), the No. 1 annular slide rail 201 is fixedly connected to the upper end of the processing main tank 1, a slip ring 203 (i.e., a first slip ring) is installed in the No. 1 annular slide rail 201, and a No. 1 gear ring 202 (i.e., a first gear belt) is fixedly connected to the upper surface of the slip ring 203.

[0043] In one embodiment of the present disclosure, a mounting tank 5 is fixedly connected to the upper end of the processing main tank 1, an air inlet 2 is provided at the upper end of one side of the processing main tank 1, a connecting valve 3 is provided at the lower end of the front surface of the processing main tank 1, and a plurality of evenly distributed air outlets 4 are provided on the other side of the processing main tank 1. A bottom tank 8 is fixedly connected to the lower end of the denitrification tank 6, and a connecting bracket 7 can be fixedly connected to the lower surface of the bottom tank 8, and the connecting bracket 7 is fixedly connected to the lower end of the processing main tank 1.

[0044] like Figure 2 As shown, a mounting ring 11 is fixedly connected to the lower end of the inner wall of the main processing tank 1, a centralized denitration component 9 is installed on the upper surface of the mounting ring 11, and the inner wall cleaning component 12 is installed above the inner wall of the main processing tank 1. In the present disclosure, the connecting pipe can first be connected to the air inlet 2 and the air outlet 4 of the main processing tank 1, and the flue gas generated by the sludge co-combustion can be denitrated through the catalyst 10 in the denitration tank 6 through the conveying device, and then the No. 2 motor 909 (i.e., the second motor) is started to drive the wind wheel 903 to rotate, and the air above the wind wheel 903 can be collected centrally through the wind wheel 903, and the flue gas can be centrally conveyed to the catalyst 10 for denitration reaction.

[0045] However, after a long period of denitration reaction, some impurities will remain on the flue gas, and these impurities will adhere to the inner wall of the device, making it difficult to clean it. At this time, another motor (i.e., the lifting drive motor) on the inner wall cleaning component 12 can drive the scraper 213 to move up and down to adjust the cleaning depth. Finally, the motor 204 (i.e., the first motor) is started to drive the slip ring 203 (i.e., the first slip ring) to rotate, and the scraper 213 can be driven to clean the inner wall of the processing tank body 1. As can be understood, the function of moving the scraper up and down can also be omitted.

[0046] like Figure 2 and Figure 3 As shown, the lower end of the wind wheel 903 is installed in the first annular slide rail 904 (i.e., the second slide ring), the first annular slide rail 904 is fixedly connected to the mounting ring 11, and the outer surface of the lower end of the wind wheel 903 is fixedly connected to the second gear ring 905 (i.e., the second gear belt), and the outer side of the second gear ring 905 is connected to a plurality of evenly distributed driven gears 906 through the engagement of the teeth, and each driven gear 906 is fixedly sleeved on the rotating rod 907, and the rotating rod 907 is rotatably installed between the mounting ring 11 and the inner wall of the bearing 902 (i.e., the limit bearing), and one side of the second gear ring 905 is connected to the inner wall of the bearing 902 (i.e., the limit bearing). A driving gear 908 is connected through meshing of the latch teeth. The driving gear 908 is fixedly sleeved on the output shaft of the No. 2 motor 909 (i.e., the second motor). The No. 2 motor 909 is fixedly connected to one side of the upper surface of the mounting ring 11. The driving gear 908 is driven to rotate by the No. 2 motor 909. The driving gear 908 is meshed with the No. 2 gear ring 905 on the outside of the wind wheel 903 to drive the wind wheel 903 to rotate with the No. 1 annular slide rail 904. The flue gas can be collected and transported in a centralized manner through the wind wheel 903, so that the flue gas can better combine with the catalyst 10 for denitrification reaction.

[0047] like Figure 4As shown, one side of the No. 1 gear ring 202 (i.e., the first gear belt) is connected to a driving gear 205 through a latching engagement, and the driving gear 205 is fixedly sleeved on one end of the motor 204 (i.e., the first motor). In one embodiment, the motor 204 is fixedly connected to one side of the inner wall of the mounting tank 5. In one embodiment, a plurality of evenly distributed limiting rings 206 (i.e. limiting parts) are fixedly connected to the inner wall of the slip ring 203 (i.e. the first slip ring), and a lifting rod 207 (corresponding to the upper end of the scraper, the lifting rod can be integrated with the scraper, or can be separately installed on the scraper to constitute the upper end of the scraper) is movably installed in each limiting ring 206. The upper end of each lifting rod 207 is fixedly connected to a connecting plate 208 (i.e. a branch arm), and one end of the inner side of the connecting plate 208 is fixedly connected to a top plate 209, and a threaded matching rod 210 is fixedly connected to the lower surface of the top plate 209. The lower end of the threaded matching rod 210 is connected to a screw rod 211 through threaded meshing, and the lower end of the screw rod 211 is fixedly connected to another motor (i.e. a lifting drive). The other motor is fixedly connected to the upper surface of the base plate 212, and the outer side of the base plate 212 is fixedly connected to the inner surface of the slip ring 203 or fixed to the slip ring 203 through the extension rod 214. The screw rod 211 is driven to rotate by another motor, and the screw rod 211 is connected to the threaded matching rod 210 through threaded engagement, which can drive the top plate 209 and the connecting plate 208 to drive the lifting rod 207 located in the limit ring 206 to move up and down, so that the height of the lifting rod 207 can be adjusted to be better suitable for cleaning the inner wall. Subsequently, the driving gear 205 is driven to rotate by the motor 204, and the driving gear 205 drives the slip ring 203 to rotate through the No. 1 gear ring 202, so that the inner wall of the device can be cleaned.

[0048] The following specifically describes an operation method of a flue gas denitrification tower provided with an inner wall cleaning component and a centralized denitrification component, comprising the following steps:

[0049] S1. First, connect the connecting pipe to the air inlet 2 and the air outlet 4 of the main processing tank 1. The flue gas generated by the sludge mixing combustion can be denitrated through the catalyst 10 in the denitration tank 6 through the conveying device;

[0050] S2, then start the second motor 909 to drive the wind wheel 903 to rotate, and the wind wheel 903 can collect the air above the wind wheel 903, and transport the flue gas to the catalyst 10 for denitration reaction;

[0051] S3. During the long-term denitration reaction, some impurities will remain on the flue gas, which will adhere to the inner wall of the device and make it difficult to clean it. Another motor on the inner wall cleaning component 12 can drive the scraper 213 to move up and down to adjust the cleaning depth;

[0052] S4. Finally, the motor 204 is started to drive the slip ring 203 to rotate, so as to drive the scraper 213 to clean the inner wall of the processing tank body 1.

[0053] Based on the above, the present disclosure proposes the following technical solutions:

[0054] 1. A flue gas denitrification tower, comprising:

[0055] Processing the main tank body, which has a cylindrical shape, and the main tank body is provided with an air inlet and an air outlet, and the air inlet is used to receive the flue gas;

[0056] An inner wall cleaning assembly comprises a scraper and a scraper driving device, wherein the scraper extends downward from the upper end of the main tank body along the axis of the main tank body and is suitable for contacting the inner wall of the main tank body, and the scraper driving device is used to drive the scraper to rotate along the inner wall of the main tank body;

[0057] The denitration tank is arranged below the main tank body and is suitable for placing a catalyst inside.

[0058] 2. The flue gas denitrification tower according to item 1, wherein:

[0059] The scraper driving device comprises a scraper circumferential movement driving unit, the scraper circumferential movement driving unit comprises a first gear ring and a first gear driving unit meshed with the first gear ring to drive the first gear ring to rotate, the first gear ring comprises a first gear belt arranged along a ring shape;

[0060] The scraper is connected to the first gear ring and is adapted to move along the circumferential direction with the first gear ring.

[0061] 3. The flue gas denitrification tower according to 2, wherein:

[0062] The scraper circumferential movement drive unit includes a first annular guide rail and a first slip ring. The first annular guide rail is fixedly connected to the upper end of the main tank body. The first slip ring cooperates with the first annular guide rail to be suitable for rotating along the first annular guide rail. The first gear belt is arranged on the first slip ring or the first slip ring constitutes the first gear ring.

[0063] 4. The flue gas denitrification tower according to 3, wherein:

[0064] The first gear belt is arranged on the upper surface of the first slip ring; and / or

[0065] The first slip ring is arranged in the annular groove of the first annular guide rail, or the first slip ring and the first annular guide rail respectively constitute the inner ring and the outer ring of the first gear belt bearing.

[0066] 5. The flue gas denitrification tower according to 3, wherein:

[0067] The first gear driving unit includes a driving gear meshed with the first gear belt, and a first motor driving the driving gear.

[0068] 6. A flue gas denitrification tower according to any one of 3-5, wherein:

[0069] The inner wall of the first gear ring is fixedly provided with a plurality of limiting parts, and the limiting parts are in the form of limiting rings or limiting cylinders. The upper end of the scraper passes through the corresponding limiting parts. The first gear ring rotates to drive the limiting parts to rotate, so that the scraper is driven by the limiting parts to move circumferentially.

[0070] 7. The flue gas denitrification tower according to 6, wherein:

[0071] The scraper driving device also includes a scraper axial movement driving unit, which is connected to the upper end of the scraper passing through the limiting portion to drive the scraper to move axially along the limiting portion.

[0072] 8. The flue gas denitrification tower according to item 7, wherein:

[0073] The scraper axial movement driving unit comprises a bottom plate and a top plate;

[0074] The bottom plate is fixedly connected to the first annular guide rail, and a lifting structure is arranged on the upper side of the bottom plate, and the lifting structure is connected to the top plate to drive the top plate to move up and down along the axial direction of the main tank body;

[0075] The top plate is provided with branch arms which are connected to the upper ends of the corresponding scrapers.

[0076] 9. The flue gas denitrification tower according to 8, wherein:

[0077] A plurality of branch arms are arranged at equal intervals around the top plate, a plurality of limiting portions correspond to the plurality of branch arms respectively, and the upper ends of the corresponding scrapers pass through the corresponding limiting portions.

[0078] 10. The flue gas denitrification tower according to 9, wherein:

[0079] The bottom plate is located below the first annular guide rail and is connected to the first annular guide rail via a plurality of connecting arms connected to the edge of the bottom plate and arranged at equal intervals in the circumferential direction.

[0080] 11. The flue gas denitrification tower according to 8, wherein:

[0081] The lifting structure comprises a screw rod, a threaded mating rod and a lifting drive motor arranged on the bottom plate, one end of the threaded mating rod is connected to the lower side of the top plate, one end of the screw rod is threadedly mated with the other end of the threaded mating rod, and the other end of the screw rod is driven to rotate by the lifting drive motor, and the lifting structure is lifted and lowered based on the threaded mating between the screw rod and the threaded mating rod; or

[0082] The lifting structure includes a driving rod driven by a lifting driving motor or hydraulic pressure, the upper end of the driving rod is connected to the lower side of the top plate, and the lower end of the driving rod is lifted and lowered by the lifting driving motor or hydraulic pressure.

[0083] 12. The flue gas denitrification tower according to any one of 1 to 11, further comprising:

[0084] The centralized denitrification component is arranged below the inner wall cleaning component and includes: a mounting ring, and an axial flow fan device installed on the mounting ring, wherein: the mounting ring is fixed to the inner wall of the lower end of the main tank body, and the axial flow fan device is suitable for concentrating the flue gas toward the denitrification tank below the axial flow fan device.

[0085] 13. The flue gas denitrification tower according to 12, wherein:

[0086] The axial flow fan device comprises:

[0087] A limit bearing, the limit bearing comprises an outer ring as a fixed ring and an inner ring as a rotating ring, the fixed ring is supported or fixed by the mounting ring;

[0088] A fan driving device, comprising a second gear ring and a second gear driving unit meshing with the second gear ring to drive the second gear ring to rotate, wherein the second gear ring comprises a second gear belt arranged along a ring shape;

[0089] The wind wheel comprises blades, the upper ends of the blades are connected to the rotating ring, the lower ends of the blades are connected to the second gear ring, and the blades are suitable for moving in the circumferential direction along with the second gear ring.

[0090] 14. The flue gas denitrification tower according to 13, wherein:

[0091] The mounting ring forms a second annular guide rail, the fan driving device comprises a second slip ring, the second slip ring cooperates with the second annular guide rail to be suitable for rotating along the second annular guide rail, the second gear belt is arranged on the second slip ring or the second slip ring forms the second gear ring.

[0092] 15. The flue gas denitrification tower according to 14, wherein:

[0093] The second gear belt is disposed on the outer surface of the second slip ring, and the second driving gear is meshed with the second gear belt; and / or

[0094] The second slip ring is arranged in the annular groove of the second annular guide rail, or the second slip ring and the second annular guide rail respectively constitute the inner ring and the outer ring of the second gear belt bearing.

[0095] 16. The flue gas denitrification tower according to 15, wherein:

[0096] The second gear driving unit includes the second driving gear meshing with the second gear belt, and a second motor driving the second driving gear, wherein the second motor is fixed to a mounting ring serving as a second annular guide rail.

[0097] 17. The flue gas denitrification tower according to 15, wherein:

[0098] The flue gas denitrification tower further comprises a plurality of rotating rods, the upper ends of the rotating rods are rotatably matched with the fixing rings, the lower ends of the rotating rods are rotatably matched with the mounting rings, and the fixing rings are supported by the mounting rings based on the rotating rods;

[0099] A driven gear is installed at the middle part of the rotating rod, and the driven gear is suitable for meshing with the second gear belt to guide the rotation of the second gear belt.

[0100] 18. The flue gas denitrification tower according to item 12, wherein:

[0101] An annular guide plate is provided at the upper inlet of the wind wheel to guide the smoke into the wind wheel.

[0102] 19. The flue gas denitrification tower according to any one of 1 to 18, further comprising:

[0103] The bottom tank is arranged below the denitrification tank.

[0104] 20. The flue gas denitrification tower according to 19, further comprising:

[0105] The installation tank is arranged on the upper side of the main tank body.

[0106] 21. The flue gas denitrification tower according to 20, wherein:

[0107] The flue gas denitrification tower is the flue gas denitrification tower according to 5; and

[0108] The first motor is mounted to an inner wall of the mounting tank.

[0109] 22. The flue gas denitrification tower according to item 1, wherein:

[0110] The air inlet is arranged at the upper end of one side of the main tank body, and a plurality of evenly distributed air outlets are arranged at the other side. A connecting valve is also arranged at the lower end of the main tank body.

[0111] 23. A method for operating a flue gas denitrification tower according to any one of 1 to 11, comprising the steps of:

[0112] The scraper is driven to rotate along the inner wall of the main tank body to clean the inner wall of the main tank body.

[0113] 24. The operating method according to 23 further comprises the steps of:

[0114] The flue gas generated by the sludge combustion is denitrated by the catalyst in the denitration tank through the conveying device;

[0115] The wind wheel is driven to rotate, and the flue gas above the wind wheel is collected and transported to the catalyst for denitrification reaction.

[0116] Although embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that changes may be made to the embodiments and combinations of elements may be made without departing from the principles and spirit of the present disclosure, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flue gas denitrification tower, comprising: The main tank body is processed to have a cylindrical shape, and the main tank body is provided with an air inlet and an air outlet, and the air inlet is used to receive the flue gas; An inner wall cleaning assembly comprises a scraper and a scraper driving device, wherein the scraper extends downward from the upper end of the main tank body along the axis of the main tank body and is suitable for contacting the inner wall of the main tank body, and the scraper driving device is used to drive the scraper to rotate along the inner wall of the main tank body; The denitration tank is arranged below the main tank body and is suitable for placing a catalyst inside.

2. The flue gas denitrification tower according to claim 1, wherein: The scraper driving device comprises a scraper circumferential movement driving unit, the scraper circumferential movement driving unit comprises a first gear ring and a first gear driving unit meshed with the first gear ring to drive the first gear ring to rotate, the first gear ring comprises a first gear belt arranged along a ring shape; The scraper is connected to the first gear ring and is adapted to move along the circumferential direction with the first gear ring.

3. The flue gas denitrification tower according to claim 2, wherein: The scraper circumferential movement drive unit includes a first annular guide rail and a first slip ring. The first annular guide rail is fixedly connected to the upper end of the main tank body. The first slip ring cooperates with the first annular guide rail to be suitable for rotating along the first annular guide rail. The first gear belt is arranged on the first slip ring or the first slip ring constitutes the first gear ring.

4. The flue gas denitrification tower according to claim 3, wherein: The first gear belt is arranged on the upper surface of the first slip ring; and / or The first slip ring is arranged in the annular groove of the first annular guide rail, or the first slip ring and the first annular guide rail respectively constitute the inner ring and the outer ring of the first gear belt bearing.

5. The flue gas denitrification tower according to claim 3, wherein: The first gear driving unit includes a driving gear meshed with the first gear belt, and a first motor driving the driving gear.

6. The flue gas denitrification tower according to any one of claims 3 to 5, wherein: The inner wall of the first gear ring is fixedly provided with a plurality of limiting parts, and the limiting parts are in the form of limiting rings or limiting cylinders. The upper end of the scraper passes through the corresponding limiting parts. The first gear ring rotates to drive the limiting parts to rotate, so that the scraper is driven by the limiting parts to move circumferentially.

7. The flue gas denitrification tower according to claim 6, wherein: The scraper driving device also includes a scraper axial movement driving unit, which is connected to the upper end of the scraper passing through the limiting portion to drive the scraper to move axially along the limiting portion.

8. The flue gas denitrification tower according to claim 7, wherein: The scraper axial movement driving unit comprises a bottom plate and a top plate; The bottom plate is fixedly connected to the first annular guide rail, and a lifting structure is provided on the upper side of the bottom plate, and the lifting structure is connected to the top plate to drive the top plate to move up and down along the axial direction of the main tank body; The top plate is provided with branch arms which are connected to the upper ends of the corresponding scrapers.

9. The flue gas denitrification tower according to claim 8, wherein: A plurality of branch arms are arranged at equal intervals around the top plate, a plurality of limiting portions correspond to the plurality of branch arms respectively, and the upper ends of the corresponding scrapers pass through the corresponding limiting portions.

10. The flue gas denitrification tower according to claim 9, wherein: The bottom plate is located below the first annular guide rail and is connected to the first annular guide rail via a plurality of connecting arms connected to the edge of the bottom plate and arranged at equal intervals in the circumferential direction.

11. The flue gas denitrification tower according to claim 8, wherein: The lifting structure comprises a screw rod, a threaded mating rod and a lifting drive motor arranged on the bottom plate, one end of the threaded mating rod is connected to the lower side of the top plate, one end of the screw rod is threadedly mated with the other end of the threaded mating rod, and the other end of the screw rod is driven to rotate by the lifting drive motor, and the lifting structure is lifted and lowered based on the threaded mating between the screw rod and the threaded mating rod; or The lifting structure includes a driving rod driven by a lifting driving motor or hydraulic pressure, the upper end of the driving rod is connected to the lower side of the top plate, and the lower end of the driving rod is lifted and lowered by the lifting driving motor or hydraulic pressure.

12. The flue gas denitrification tower according to any one of claims 1 to 11, further comprising: The centralized denitrification component is arranged below the inner wall cleaning component and includes: a mounting ring, and an axial flow fan device installed on the mounting ring, wherein: the mounting ring is fixed to the inner wall of the lower end of the main tank body, and the axial flow fan device is suitable for concentrating the flue gas toward the denitrification tank below the axial flow fan device.

13. The flue gas denitrification tower according to claim 12, wherein: The axial flow fan device comprises: A limit bearing, the limit bearing comprises an outer ring as a fixed ring and an inner ring as a rotating ring, the fixed ring is supported or fixed by the mounting ring; A fan driving device, comprising a second gear ring and a second gear driving unit meshing with the second gear ring to drive the second gear ring to rotate, wherein the second gear ring comprises a second gear belt arranged along a ring shape; The wind wheel comprises blades, the upper ends of the blades are connected to the rotating ring, the lower ends of the blades are connected to the second gear ring, and the blades are suitable for moving in the circumferential direction along with the second gear ring.

14. The flue gas denitrification tower according to claim 13, wherein: The mounting ring forms a second annular guide rail, the fan driving device comprises a second slip ring, the second slip ring cooperates with the second annular guide rail to be suitable for rotating along the second annular guide rail, the second gear belt is arranged on the second slip ring or the second slip ring forms the second gear ring.

15. The flue gas denitrification tower according to claim 14, wherein: The second gear belt is disposed on the outer surface of the second slip ring, and the second driving gear is meshed with the second gear belt; and / or The second slip ring is arranged in the annular groove of the second annular guide rail, or the second slip ring and the second annular guide rail respectively constitute the inner ring and the outer ring of the second gear belt bearing.

16. The flue gas denitrification tower according to claim 15, wherein: The second gear driving unit includes the second driving gear meshing with the second gear belt, and a second motor driving the second driving gear, wherein the second motor is fixed to a mounting ring serving as a second annular guide rail.

17. The flue gas denitrification tower according to claim 15, wherein: The flue gas denitrification tower further comprises a plurality of rotating rods, the upper ends of the rotating rods are rotatably matched with the fixing rings, the lower ends of the rotating rods are rotatably matched with the mounting rings, and the fixing rings are supported by the mounting rings based on the rotating rods; A driven gear is installed at the middle part of the rotating rod, and the driven gear is suitable for meshing with the second gear belt to guide the rotation of the second gear belt.

18. The flue gas denitrification tower according to claim 12, wherein: An annular guide plate is provided at the upper inlet of the wind wheel to guide the smoke into the wind wheel.

19. The flue gas denitrification tower according to any one of claims 1 to 18, further comprising: The bottom tank is arranged below the denitrification tank.

20. The flue gas denitrification tower according to claim 19, further comprising: The installation tank is arranged on the upper side of the main tank body.

21. The flue gas denitrification tower according to claim 20, wherein: The flue gas denitrification tower is the flue gas denitrification tower according to claim 5; and The first motor is mounted to an inner wall of the mounting tank.

22. The flue gas denitrification tower according to claim 1, wherein: The air inlet is arranged at the upper end of one side of the main tank body, and a plurality of evenly distributed air outlets are arranged at the other side. A connecting valve is also arranged at the lower end of the main tank body.

23. A method for operating a flue gas denitrification tower according to any one of claims 1 to 11, comprising the steps of: The scraper is driven to rotate along the inner wall of the main tank body to clean the inner wall of the main tank body.

24. The operating method according to claim 23, further comprising the steps of: The flue gas generated by the sludge combustion is denitrated by the catalyst in the denitration tank through the conveying device; The wind wheel is driven to rotate, and the flue gas above the wind wheel is collected and transported to the catalyst for denitrification reaction.

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