Boiler flue gas full load denitrification device

Abstract

A boiler flue gas full-load denitration device belongs to the field of boiler flue gas denitration. In order to solve the problem that it is difficult to replace the inactive catalyst in the existing full-load denitration device; the present invention uses an economizer, a replacement component, a catalytic arrangement tube and a honeycomb denitration catalyst plate. After the boiler flue gas enters the main air intake pipe, the economizer inside the main air intake pipe will first absorb part of the heat in the flue gas, and then the flue gas enters bronchus A and bronchus B, and will be further deheated by the economizers in bronchus A and bronchus B. The hierarchical economizer arrangement is adopted to meet the full-load denitration requirements. At the same time, four groups of honeycomb denitration catalyst plates are arranged, three of which are operated together, and the other group is placed in a placement box. When one of the three groups of honeycomb denitration catalyst plates in bronchus B fails, the honeycomb denitration catalyst plate in the placement box can be taken out in time for replacement.

Description

Technical Field

[0001] The invention relates to the technical field of boiler flue gas denitration, and in particular to a boiler flue gas full-load denitration device. Background Art

[0002] Boiler flue gas refers to the gas mixture produced after fuel is burned in industrial boilers, power plant boilers or other combustion equipment. These flue gases are mainly composed of nitrogen, carbon dioxide, water vapor, and may contain oxygen, carbon monoxide, sulfur oxides, nitrogen oxides, particulate matter (such as ash and unburned carbon) and other pollutants. Among them, nitrogen oxides are more harmful to the environment, so denitrification equipment is indispensable.

[0003] In the Chinese patent with application number CN202110747574.5, a flue gas denitrification device is disclosed, including a denitrification catalytic component, a monitoring component and a controller; the denitrification catalytic component and the monitoring component are electrically connected to the controller respectively; the denitrification catalytic component is used to catalyze the reaction of nitrogen oxides in the flue gas; the monitoring component is used to monitor the catalytic environment and / or catalytic capacity of the denitrification catalytic component, and transmit the monitoring information to the controller; the controller is used to control the temperature of the denitrification catalytic component according to the monitoring information. The flue gas denitrification device of the present invention solves the dependence of the catalyst removal effect of the current denitrification technology on the flue gas temperature, can monitor the catalytic efficiency in real time, and always maintain high catalytic efficiency, can realize the efficient and stable operation of the denitrification system when the coal-fired power plant participates in the deep peak regulation of the power grid and the flue gas at the tail of the boiler changes in a large range. The device works stably and reliably and has a strong denitrification catalytic ability.

[0004] During operation of the above-mentioned patent, the denitrification catalytic component cannot cope with emergencies. During the entire operation process, the activity of the catalyst is time-limited. When the activity of the catalyst decreases until there is no catalytic effect, the quality of the reaction between the boiler flue gas and ammonia water will decrease, thereby causing a decrease in the quality of denitrification. At the same time, the economizer lacks a reasonable layout, which makes it difficult to denitrify at full load.

[0005] To this end, we proposed a full-load denitrification device for boiler flue gas. Summary of the invention

[0006] The purpose of the present invention is to provide a boiler flue gas full-load denitration device, which solves the problem in the background art that it is difficult to replace the inactive catalyst in the current full-load denitration device.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a boiler flue gas full-load denitration device, comprising a main air intake pipe, an auxiliary air intake pipe connected to one end of the main air intake pipe, a support column arranged at the lower ends of the main air intake pipe and the auxiliary air intake pipe, and an economizer arranged inside the main air intake pipe and the auxiliary air intake pipe, wherein the auxiliary air intake pipe comprises a bronchus A and a bronchus B arranged at one end of the main air intake pipe, a replacement component is arranged at the upper end of the bronchus B, a catalytic component is arranged inside the bronchus B, and the replacement component is opposite to the catalytic component;

[0008] The catalytic assembly includes a catalytic arrangement tube arranged inside the bronchus B, an air duct is embedded in the inner wall of the catalytic arrangement tube, and a honeycomb denitration catalyst plate is arranged inside the catalytic arrangement tube, four groups of honeycomb denitration catalyst plates are arranged, three groups of honeycomb denitration catalyst plates are arranged in sequence inside the catalytic arrangement tube, and another group of honeycomb denitration catalyst plates is located in the replacement assembly, and magnetic suction plates are embedded on the upper surfaces of the four groups of honeycomb denitration catalyst plates, and side grooves are opened on both sides of the four groups of honeycomb denitration catalyst plates, and top blocks are arranged inside the side grooves, and a pneumatic telescopic rod is also arranged in one group of the side grooves, one end of the pneumatic telescopic rod is connected to the inner wall of the catalytic arrangement tube, and the other end of the pneumatic telescopic rod is provided with a lifting block, a control valve is arranged at the pipe mouth of the air duct, and a locking bolt is arranged on the outer surface of the air duct, the air duct is connected to the pneumatic telescopic rod, one end of the locking bolt is located at the connection between the air duct and the pneumatic telescopic rod, and the other end of the locking bolt passes through the wall of the catalytic arrangement tube.

[0009] Furthermore, the replacement component includes a displacement plate arranged at the upper end of the bronchus B, a placement box hinged on the upper end of the displacement plate, a displacement groove is provided on the upper surface of the bronchus B, the displacement plate is slidably connected to the displacement groove by a displacement bar arranged at the lower end thereof, an external pump body is provided on one side of the bronchus B, one end of the external pump body is connected to the external ammonia water, the other end of the external pump body is located in the bronchus B, and is located at an end close to the connection between the bronchus B and the main intake pipe, a perforated groove is provided on the outer surface of the displacement plate, a groove and a through hole are provided on the upper surface of the placement box, a strong magnetic plate is embedded in the interior of the groove, an extended magnetic rod is penetrated in the interior of the through hole, a limit tube is provided at the upper end of the placement box, an adjustment bolt is provided on the outer surface of the limit tube, the limit tube and the through hole are arranged in the same vertical plane, one end of the extended magnetic rod passes through the limit tube and is located in the placement box, and a honeycomb denitrification catalyst plate is placed in the placement box.

[0010] Furthermore, one end of the bronchus A and bronchus B is provided with an exhaust pipe, and the lower ends of the bronchus A and bronchus B are provided with a drain pipe A, a drain pipe B and a processing component, wherein the catalytic component in the bronchus B is located between the external pump body and the processing component.

[0011] Furthermore, the treatment component includes a treatment box arranged at the lower ends of bronchus A and bronchus B, a nozzle arranged at the upper end of the treatment box, and an inclined plate arranged on one side of the upper end of the treatment box. The upper end of the treatment box passes through the inner walls of bronchus A and bronchus B and is located inside bronchus A and bronchus B. The nozzle and the inclined plate are also located inside bronchus A and bronchus B. An external pipe is arranged on one side of the treatment box. The treatment box at the lower end of bronchus A is filled with liquid urea, and the treatment box at the lower end of bronchus B is filled with ammonia water. Multiple groups of nozzles are arranged, and connecting pipes are arranged at the lower ends of the multiple groups of nozzles. A water pump is arranged at one end of the connecting pipe, and one end of the water pump is connected to the treatment box.

[0012] Furthermore, both bronchus A and bronchus B are provided with an anti-touch component, and the anti-touch component corresponds to the position of the processing component.

[0013] Furthermore, the anti-touch component includes an elastic block arranged on the upper top wall of bronchus A and bronchus B, and an inclined steel plate arranged at the lower end of the elastic block, a wall groove A is opened on the outer surface of the elastic block, a wall rod A is rotatably arranged inside the wall groove A, and an impeller is arranged on the outer surface of the wall rod A.

[0014] Furthermore, a wall groove B is provided on the outer surface of the elastic block, the internal rotation arrangement of the wall groove B is connected to the wall rod B, a rolling wheel is provided on the outer surface of the wall rod B, one end of the wall rod B is connected to the wall rod A, and an installation groove is provided on one side of the inclined steel plate, the installation groove is connected to the wall groove B, an elastic steel sheet is provided inside the installation groove, and the elastic steel sheet is opposite to the rolling wheel.

[0015] Furthermore, the wall grooves A are provided with two groups, which are respectively located on both sides of the wall groove B. An elastic cover is provided on the outer surface of the inclined steel plate, and one end of the elastic cover is connected to the upper top wall of the bronchus A or the bronchus B.

[0016] Furthermore, a controller is provided on the outer surface of the main intake pipe, and monitoring modules are provided inside the main intake pipe and the auxiliary intake pipe. The monitoring modules include flue gas temperature monitoring units and nitrogen oxide concentration monitoring units provided on the inner walls of the main intake pipe and the auxiliary intake pipe. The monitoring modules are connected to the controller signals. Four groups of flue gas temperature monitoring units and four groups of nitrogen oxide concentration monitoring units are provided respectively, among which two groups of flue gas temperature monitoring units and two groups of nitrogen oxide concentration monitoring units are provided in the main intake pipe, and one group of flue gas temperature monitoring units and one group of nitrogen oxide concentration monitoring units are provided respectively in bronchus A and bronchus B.

[0017] Furthermore, the controller is provided with a main control module inside, the main control module is signal-connected to the coordinate axis establishment module, the coordinate axis establishment module is signal-connected to the signal receiving module, the signal receiving module is signal-connected to the monitoring point display module, the monitoring point display module is signal-connected to the monitoring object marking module, the monitoring object marking module is signal-connected to the monitoring data display module, the monitoring data display module is signal-connected to the data change display module, and the monitoring module is signal-connected to the signal receiving module.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The boiler flue gas full-load denitrification device proposed in the present invention is difficult to replace the inactive catalyst in the prior art for the full-load denitrification device. However, the present invention uses an economizer, a replacement component, a catalytic arrangement tube and a honeycomb denitrification catalyst plate. After the boiler flue gas enters the main air intake pipe, the economizer inside the main air intake pipe will first absorb part of the heat in the flue gas, and then the flue gas enters bronchus A and bronchus B, and will be further deheated by the economizers in bronchus A and bronchus B. The hierarchical economizer arrangement is adopted to meet the full-load denitrification requirements. At the same time, four groups of honeycomb denitrification catalyst plates are arranged, three of which are operated together to catalyze the flue gas in bronchus B, so as to facilitate the reaction between ammonia water and nitrogen oxides in the flue gas and improve the reaction quality. The other group is placed in a placement box. When one of the three groups of honeycomb denitrification catalyst plates in bronchus B fails, the honeycomb denitrification catalyst plate in the placement box can be taken out and replaced in time, which has little impact on the overall work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the boiler flue gas full-load denitrification device of the present invention.

[0021] Figure 2 Schematic diagram of the structure of bronchial pipe A and bronchial pipe B of the boiler flue gas full load denitrification device of the present invention Figure 1 .

[0022] Figure 3 Schematic diagram of the structure of bronchial pipe A and bronchial pipe B of the boiler flue gas full load denitrification device of the present invention Figure 2 .

[0023] Figure 4 It is a schematic diagram of the structure of bronchial pipe B of the boiler flue gas full-load denitration device of the present invention.

[0024] Figure 5 It is a schematic diagram of the internal structure of bronchial pipe B of the boiler flue gas full-load denitration device of the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the trigger component of the boiler flue gas full-load denitration device of the present invention.

[0026] Figure 7 It is a schematic diagram of the structure of the catalytic component of the boiler flue gas full-load denitration device of the present invention.

[0027] Figure 8 It is a schematic diagram of the structure of the catalytic component of the boiler flue gas full-load denitration device of the present invention.

[0028] Fig. 9 It is a schematic diagram of the structure of the catalytic component of the boiler flue gas full-load denitration device of the present invention.

[0029] Fig.10 This is a schematic diagram of the internal structure of the placement box of the boiler flue gas full-load denitration device of the present invention.

[0030] Fig.11 It is a schematic diagram of the structure of bronchial pipe A of the boiler flue gas full-load denitration device of the present invention.

[0031] Fig.12 This is a flowchart of the controller program of the boiler flue gas full-load denitrification device of the present invention.

[0032] Fig.13 This is a schematic diagram showing monitoring points of the boiler flue gas full-load denitration device of the present invention on the coordinate axis.

[0033] In the figure: 1. Main air intake pipe; 2. Auxiliary air intake pipe; 21. Bronchus A; 22. Bronchus B; 23. Exhaust pipe; 24. Drain pipe A; 25. Drain pipe B; 26. Processing component; 261. Processing box; 262. Nozzle; 263. Inclined plate; 3. Support column; 4. Economizer; 5. Controller; 51. Main control module; 52. Coordinate axis establishment module; 53. Signal receiving module; 54. Monitoring point display module; 55. Monitoring object marking module; 56. Monitoring data display module; 57. Data change display module; 6. Replacement component; 61. Displacement plate; 611. Perforated groove; 62. Placement box; 621. Groove; 622. Through hole; 623. Strong magnetic plate; 624. Limiting tube; 62 5. Adjusting bolt; 626. Extended magnetic rod; 63. Displacement slot; 64. External pump body; 7. Catalytic component; 71. Catalytic arrangement pipe; 72. Air duct; 721. Control valve; 722. Locking bolt; 73. Honeycomb denitrification catalyst plate; 74. Magnetic plate; 75. Top block; 76. Side slot; 77. Lifting block; 78. Air pressure telescopic rod; 79. Guide plate; 8. Anti-touch component; 81. Inclined steel plate; 811. Mounting slot; 812. Elastic steel sheet; 82. Elastic block; 83. Wall slot A; 84. Wall rod A; 85. Impeller; 86. Wall slot B; 861. Wall rod B; 862. Rolling wheel; 87. Elastic cover; 9. Monitoring module; 91. Flue gas temperature monitoring unit; 92. Nitrogen oxide concentration monitoring unit. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1

[0036] In order to solve the technical problem of how to quickly replace the honeycomb denitration catalyst plate 73, as Figure 1-Figure 11 As shown, the following preferred technical solutions are provided:

[0037] A full-load denitrification device for boiler flue gas includes a main air intake pipe 1, an auxiliary air intake pipe 2 connected to one end of the main air intake pipe 1, a support column 3 arranged at the lower ends of the main air intake pipe 1 and the auxiliary air intake pipe 2, and an economizer 4 arranged inside the main air intake pipe 1 and the auxiliary air intake pipe 2. The auxiliary air intake pipe 2 includes a bronchus A21 and a bronchus B22 arranged at one end of the main air intake pipe 1, a replacement component 6 is arranged at the upper end of the bronchus B22, a catalytic component 7 is arranged inside the bronchus B22, and the replacement component 6 is opposite to the catalytic component 7.

[0038] The catalytic component 7 includes a catalytic arrangement tube 71 arranged inside the bronchial tube B22, an air duct 72 is embedded in the inner wall of the catalytic arrangement tube 71, and a honeycomb denitration catalyst plate 73 is arranged inside the catalytic arrangement tube 71, and four groups of honeycomb denitration catalyst plates 73 are arranged, three groups of honeycomb denitration catalyst plates 73 are sequentially arranged inside the catalytic arrangement tube 71, and another group of honeycomb denitration catalyst plates 73 is located in the replacement component 6, and magnetic suction plates 74 are embedded on the upper surfaces of the four groups of honeycomb denitration catalyst plates 73, and side grooves 76 are opened on both sides of the four groups of honeycomb denitration catalyst plates 73, and top blocks 75 are arranged inside the side grooves 76, and a pneumatic telescopic rod 78 is also arranged in one group of the side grooves 76, one end of the pneumatic telescopic rod 78 is connected to the inner wall of the catalytic arrangement tube 71, and the other end of the pneumatic telescopic rod 78 is provided with a lifting block 77, and a control valve 721 is provided at the pipe mouth of the air duct 72, and the air duct A locking bolt 722 is provided on the outer surface of 72, and the air duct 72 is connected to the pneumatic telescopic rod 78. One end of the locking bolt 722 is located at the connection point between the air duct 72 and the pneumatic telescopic rod 78, and the other end of the locking bolt 722 passes through the wall of the catalytic arrangement tube 71. One end of the air duct 72 is in a closed state. When the honeycomb denitration catalyst plate 73 needs to be replaced, the control valve 721 is opened to allow local boiler flue gas to enter the air duct 72, and the locking bolt 722 corresponding to the honeycomb denitration catalyst plate 73 that needs to be replaced is unscrewed, and the boiler flue gas will enter the corresponding pneumatic telescopic rod 78, thereby making the pneumatic telescopic rod 78 longer, thereby driving the lifting block 77 to move upward, and then the honeycomb denitration catalyst plate 73 that needs to be replaced moves upward, and the inner wall of the catalytic arrangement tube 71 is provided with a guide plate 79, and the guide plate 79 is slidably connected to the side groove 76. During the movement, the honeycomb denitration catalyst plate 73 will move up and down along the guide plate 79.

[0039] The replacement assembly 6 includes a displacement plate 61 arranged at the upper end of the bronchus B22, a placement box 62 hinged at the upper end of the displacement plate 61, a displacement groove 63 is provided on the upper surface of the bronchus B22, the displacement plate 61 is slidably connected to the displacement groove 63 through a displacement bar arranged at the lower end thereof, an external pump body 64 is arranged on one side of the bronchus B22, one end of the external pump body 64 is connected to the external ammonia water, and the other end of the external pump body 64 is located in the bronchus B22 and is located near the end where the bronchus B22 is connected to the main intake pipe 1. A perforated groove 611 is provided on the surface, a groove 621 and a through hole 622 are provided on the upper surface of the placement box 62, a strong magnetic plate 623 is embedded in the groove 621, an extended magnetic rod 626 is penetrated in the through hole 622, a limit tube 624 is provided on the upper end of the placement box 62, an adjusting bolt 625 is provided on the outer surface of the limit tube 624, the limit tube 624 and the through hole 622 are arranged in the same vertical plane, one end of the extended magnetic rod 626 passes through the limit tube 624 and is located in the placement box 62, and the placement box 62 is placed. Honeycomb denitration catalyst plate 73, when the honeycomb denitration catalyst plate 73 needs to be replaced, the displacement plate 61 is moved to the top of the honeycomb denitration catalyst plate 73 that needs to be replaced, and the adjusting bolt 625 is loosened to make the extended magnetic rod 626 move downward until one end of the extended magnetic rod 626 contacts and is magnetically connected with the magnetic suction plate 74, and then the extended magnetic rod 626 is pulled upward, and the honeycomb denitration catalyst plate 73 is driven to move upward in combination with the air pressure telescopic rod 78, so that the honeycomb denitration catalyst plate 73 that needs to be replaced can be quickly taken out. After taking it out, align the honeycomb denitration catalyst plate 73 in the placement box 62 with the groove from which the honeycomb denitration catalyst plate 73 was just taken out, and then remove the strong magnetic plate 623. The new honeycomb denitration catalyst plate 73 will slowly move downward to complete the replacement. When replacement is not needed, the displacement plate 61 is moved to the edge of the bronchus B22 to ensure that the catalytic arrangement tube 71 is not opposite to the perforated groove 611. In addition, when the boiler flue gas passes through the external pump body 64, the external pump body 64 sprays ammonia water to make it pre-react, which is convenient for the catalysis of the honeycomb denitration catalyst plate 73.

[0040] An exhaust pipe 23 is provided at one end of the bronchus A21 and the bronchus B22, and a drain pipe A24, a drain pipe B25 and a processing component 26 are provided at the lower ends of the bronchus A21 and the bronchus B22, wherein the catalytic component 7 in the bronchus B22 is located between the external pump body 64 and the processing component 26, and the gas in the bronchus A21 and the bronchus B22 will be discharged from the exhaust pipe 23. At the same time, the boiler flue gas treated by the processing component 26 will produce water, and the drain pipe A24 and the drain pipe B25 can discharge the produced water. In addition, in the bronchus B22, the flue gas will first be contacted and reacted with ammonia water sprayed from the external pump body 64, and then catalyzed by the catalytic component 7 to improve the reaction quality, and finally passed through the processing component 26 to further treat the flue gas.

[0041] The treatment assembly 26 includes a treatment box 261 arranged at the lower ends of the bronchus A21 and the bronchus B22, a nozzle 262 arranged at the upper end of the treatment box 261, and an inclined plate 263 arranged at one side of the upper end of the treatment box 261. The upper end of the treatment box 261 passes through the inner walls of the bronchus A21 and the bronchus B22 and is located inside the bronchus A21 and the bronchus B22. The nozzle 262 and the inclined plate 263 are also located inside the bronchus A21 and the bronchus B22. An external pipe is arranged on one side of the treatment box 261. The treatment box 261 at the lower end of the bronchus A21 is filled with liquid urea, and the treatment box 261 at the lower end of the bronchus B22 is filled with ammonia water. The nozzle 262 is provided with multiple groups, and the multiple groups of nozzles are provided. A connecting pipe is provided at the lower end of the nozzle 262 of the group, and a water pump is provided at one end of the connecting pipe. One end of the water pump is connected to the processing box 261. Liquid urea and ammonia water are respectively loaded into the processing boxes 261 of the two groups in advance, wherein the processing box 261 on the bronchus B22 is loaded with ammonia water, and the processing box 261 on the bronchus A21 is loaded with liquid urea. Turn on the water pump to spray the liquid urea and ammonia water through the nozzle 262. At the same time, after the boiler flue gas enters the bronchus A21 and the bronchus B22 from the main air inlet pipe 1, the boiler flue gas in the bronchus A21 will contact and react with the liquid urea to generate nitrogen and water, and the boiler flue gas in the bronchus B22 will react with the ammonia water to generate nitrogen and water.

[0042] Bronchus A21 and bronchus B22 are both provided with a reverse component 8, which corresponds to the position of the processing component 26. The ammonia water and liquid urea sprayed from the processing component 26 will first move upward and then touch the reverse component 8. The ammonia water and liquid urea will move downward again after rebounding from the reverse component 8, and will come into contact with the boiler flue gas twice.

[0043] The anti-touch component 8 includes an elastic block 82 arranged on the upper top wall of the bronchus A21 and the bronchus B22, and an inclined steel plate 81 arranged at the lower end of the elastic block 82. A wall groove A83 is opened on the outer surface of the elastic block 82. A wall rod A84 is rotatably arranged inside the wall groove A83. An impeller 85 is arranged on the outer surface of the wall rod A84. The boiler flue gas entering the bronchus A21 and the bronchus B22 will pass through the wall groove A83 and blow toward the impeller 85, thereby driving the wall rod A84 to rotate. The inclined steel plate 81 and the nozzle 262 are arranged in the same vertical plane. The liquid sprayed from the nozzle 262 will hit the inclined steel plate 81, and diffuse downward again after rebounding and dispersion of the inclined steel plate 81.

[0044] The outer surface of the elastic block 82 is also provided with a wall groove B86, the inner rotation setting of the wall groove B86 is connected to the wall rod B861, the outer surface of the wall rod B861 is provided with a rolling wheel 862, one end of the wall rod B861 is connected to the wall rod A84, a mounting groove 811 is provided on one side of the inclined steel plate 81, the mounting groove 811 is connected to the wall groove B86, an elastic steel sheet 812 is provided inside the mounting groove 811, the elastic steel sheet 812 is opposite to the rolling wheel 862, and the wall rod A84 will rotate when rotating. The wall rod B861 is driven to rotate, thereby driving the rolling wheel 862 to rotate. During the rotation process, the rolling wheel 862 will hit the elastic steel sheet 812, causing the elastic steel sheet 812 to vibrate, and then the inclined steel plate 81 to vibrate. When the liquid sprayed from the nozzle 262 hits the inclined steel plate 81, the inclined steel plate 81 vibrates continuously, so that the liquid in contact with the inclined steel plate 81 is dispersed more thoroughly, and the boiler flue gas and liquid are mixed more thoroughly, thereby improving the reaction quality.

[0045] There are two groups of wall grooves A83, which are located on both sides of the wall groove B86 respectively. An elastic cover 87 is provided on the outer surface of the inclined steel plate 81. One end of the elastic cover 87 is connected to the upper top wall of the bronchus A21 or the bronchus B22. When the boiler smoke passes through the wall grooves A83 and B86, the elastic cover 87 can prevent the boiler smoke from being directly discharged outward through the wall grooves A83 and B86.

[0046] Specifically, after the boiler flue gas enters the main air intake pipe 1, the economizer 4 inside the main air intake pipe 1 will first absorb part of the heat in the flue gas, and then the flue gas enters the bronchial pipe A21 and the bronchial pipe B22, and will be further deheated by the economizer 4 in the bronchial pipe A21 and the bronchial pipe B22. The hierarchical economizer arrangement can meet the full-load denitration requirements. At the same time, four groups of honeycomb denitration catalyst plates 73 are arranged, three of which are operated together to catalyze the flue gas in the bronchial pipe B22, so as to facilitate the reaction between ammonia water and nitrogen oxides in the flue gas and improve the reaction quality. The other group is placed in the placement box 62. When one of the three groups of honeycomb denitration catalyst plates 73 in the bronchial pipe B22 fails, the honeycomb denitration catalyst plate 73 in the placement box 62 can be taken out and replaced in time, which has little impact on the overall work efficiency.

[0047] When one of the three groups of honeycomb denitration catalyst plates 73 in the bronchial pipe B22 fails, the control valve 721 is opened to allow local boiler smoke to enter the air duct 72, and the locking bolt 722 corresponding to the honeycomb denitration catalyst plate 73 to be replaced is unscrewed, and the boiler smoke will enter the corresponding air pressure telescopic rod 78, thereby lengthening the air pressure telescopic rod 78, thereby driving the lifting block 77 to move upward, and then the honeycomb denitration catalyst plate 73 to be replaced is moved upward, and at the same time, the displacement plate 61 is moved to the top of the honeycomb denitration catalyst plate 73 to be replaced, and the adjusting bolt 625 is loosened to lengthen the magnetic rod 62. 6 moves downward until one end of the extended magnetic rod 626 contacts and magnetically connects with the magnetic suction plate 74, and then pulls the extended magnetic rod 626 upward to quickly take out the honeycomb denitration catalyst plate 73 that needs to be replaced. After taking it out, tighten the adjusting bolt 625 to prevent the extended magnetic rod 626 from falling. Secondly, align the honeycomb denitration catalyst plate 73 in the placement box 62 with the groove where the honeycomb denitration catalyst plate 73 was just taken out, and then remove the strong magnetic plate 623. The new honeycomb denitration catalyst plate 73 will slowly move downward to complete the replacement, which greatly improves the replacement efficiency of the honeycomb denitration catalyst plate 73 and indirectly improves the overall work efficiency.

[0048] In order to solve the technical problem of how to more clearly know the flue gas temperature and nitrogen oxide concentration during the reaction process, such as Fig.12 and Fig.13 As shown, the following preferred technical solutions are provided:

[0049] A controller 5 is provided on the outer surface of the main intake pipe 1, and monitoring modules 9 are provided inside the main intake pipe 1 and the auxiliary intake pipe 2. The monitoring module 9 includes a flue gas temperature monitoring unit 91 and a nitrogen oxide concentration monitoring unit 92 which are provided on the inner walls of the main intake pipe 1 and the auxiliary intake pipe 2. The monitoring module 9 is signal-connected to the controller 5. Four groups of flue gas temperature monitoring units 91 and nitrogen oxide concentration monitoring units 92 are provided respectively, among which two groups of flue gas temperature monitoring units 91 and two groups of nitrogen oxide concentration monitoring units 92 are provided in the main intake pipe 1, and one group of flue gas temperature monitoring units 91 and one group of nitrogen oxide concentration monitoring units 92 are provided in the bronchus A21 and the bronchus B22 respectively. In the process of denitrification of boiler flue gas, the flue gas temperature monitoring unit 91 and the nitrogen oxide concentration monitoring unit 92 are used to detect the temperature and nitrogen oxide concentration of the flue gas in the main intake pipe 1 and the auxiliary intake pipe 2.

[0050] The controller 5 is provided with a main control module 51 inside. The main control module 51 is signal-connected to a coordinate axis establishment module 52. The coordinate axis establishment module 52 is signal-connected to a signal receiving module 53. The signal receiving module 53 is signal-connected to a monitoring point display module 54. The monitoring point display module 54 is signal-connected to a monitoring object marking module 55. The monitoring object marking module 55 is signal-connected to a monitoring data display module 56. The monitoring data display module 56 is signal-connected to a data change display module 57. The monitoring module 9 is signal-connected to the signal receiving module 53.

[0051] Specifically, during the entire denitrification process, the flue gas temperature monitoring unit 91 and the nitrogen oxide concentration monitoring unit 92 are used to monitor the flue gas temperature and nitrogen oxide concentration in the main intake pipe 1 and the auxiliary intake pipe 2. At the same time, the coordinate axis establishment module 52 is used to display the coordinate axis on the display screen of the controller 5, and the monitoring points are displayed on the coordinate axis. At the same time, the monitoring range is displayed with boxes, totaling four groups of boxes. Then, the monitoring object labeling module 55 is used to display straight lines and broken lines in the four groups of boxes, where the straight lines represent the flue gas temperature data and the broken lines represent the nitrogen oxide concentration data. At the same time, the monitoring data display module 56 is used to display the flue gas temperature values ​​and the nitrogen oxide concentration values ​​at the bottom of the four groups of boxes. In addition, the data change display module 57 can make the straight lines and broken lines longer or shorter, as well as the corresponding numerical changes, to facilitate observation by staff.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A boiler flue gas full-load denitration device, comprising a main air intake pipe (1), an auxiliary air intake pipe (2) connected to one end of the main air intake pipe (1), a support column (3) arranged at the lower ends of the main air intake pipe (1) and the auxiliary air intake pipe (2), and an economizer (4) arranged inside the main air intake pipe (1) and the auxiliary air intake pipe (2), characterized in that: The auxiliary air intake pipe (2) comprises a bronchus A (21) and a bronchus B (22) which are arranged at one end of the main air intake pipe (1); a replacement component (6) is arranged at the upper end of the bronchus B (22); a catalytic component (7) is arranged inside the bronchus B (22); the replacement component (6) is opposite to the catalytic component (7); The catalytic assembly (7) comprises a catalytic arrangement tube (71) arranged inside the bronchial tube B (22), an air inlet tube (72) being embedded in the inner wall of the catalytic arrangement tube (71), and a honeycomb type denitration catalyst plate (73) being arranged inside the catalytic arrangement tube (71), wherein four groups of the honeycomb type denitration catalyst plates (73) are arranged, wherein three groups of the honeycomb type denitration catalyst plates (73) are sequentially arranged inside the catalytic arrangement tube (71), and another group of the honeycomb type denitration catalyst plates (73) is located inside the replacement assembly (6), magnetic suction plates (74) are embedded in the upper surfaces of the four groups of honeycomb type denitration catalyst plates (73), and side grooves (76) are provided on both sides of the four groups of honeycomb type denitration catalyst plates (73). A top block (75) is arranged inside the side groove (76), and a pneumatic telescopic rod (78) is also arranged inside one group of the side grooves (76). One end of the pneumatic telescopic rod (78) is connected to the inner wall of the catalytic arrangement tube (71), and the other end of the pneumatic telescopic rod (78) is provided with an upper lifting block (77). A control valve (721) is arranged at the pipe mouth of the air duct (72), and a locking bolt (722) is arranged on the outer surface of the air duct (72). The air duct (72) is connected to the pneumatic telescopic rod (78), one end of the locking bolt (722) is located at the connection point between the air duct (72) and the pneumatic telescopic rod (78), and the other end of the locking bolt (722) passes through the pipe wall of the catalytic arrangement tube (71); The replacement assembly (6) comprises a displacement plate (61) arranged at the upper end of the bronchus B (22), a placement box (62) hingedly connected to the upper end of the displacement plate (61), a displacement groove (63) being provided on the upper surface of the bronchus B (22), the displacement plate (61) being slidably connected to the displacement groove (63) via a displacement strip arranged at the lower end thereof, an external pump body (64) being provided at one side of the bronchus B (22), one end of the external pump body (64) being connected to external ammonia water, the other end of the external pump body (64) being located inside the bronchus B (22) and at one end close to the connection between the bronchus B (22) and the main air inlet pipe (1), and a perforation being provided on the outer surface of the displacement plate (61) A groove (611) is formed on the upper surface of the placement box (62), a groove (621) and a through hole (622) are formed, a strong magnetic plate (623) is embedded in the groove (621), an extended magnetic rod (626) is passed through the through hole (622), a limit tube (624) is provided at the upper end of the placement box (62), an adjustment bolt (625) is provided on the outer surface of the limit tube (624), the limit tube (624) and the through hole (622) are arranged in the same vertical plane, one end of the extended magnetic rod (626) passes through the limit tube (624) and is located in the placement box (62), and a honeycomb denitration catalyst plate (73) is placed in the placement box (62); When one of the three groups of honeycomb denitration catalyst plates (73) in the bronchial pipe B (22) fails, the control valve (721) is opened to allow local boiler flue gas to enter the air intake pipe (72), and the locking bolt (722) corresponding to the honeycomb denitration catalyst plate (73) to be replaced is unscrewed, so that the boiler flue gas will enter the corresponding air pressure telescopic rod (78), thereby making the air pressure telescopic rod (78) longer, thereby driving the lifting block (77) to move upward, thereby causing the honeycomb denitration catalyst plate (73) to be replaced to move upward, and at the same time, the displacement plate (61) is moved to the top of the honeycomb denitration catalyst plate (73) to be replaced, and the displacement plate (61) is loosened. Open the adjusting bolt (625) to allow the extended magnetic rod (626) to move downward until one end of the extended magnetic rod (626) contacts and is magnetically connected to the magnetic suction plate (74), and then pull the extended magnetic rod (626) upward to quickly remove the honeycomb denitration catalyst plate (73) that needs to be replaced. After removal, tighten the adjusting bolt (625) to prevent the extended magnetic rod (626) from falling. Next, align the honeycomb denitration catalyst plate (73) in the placement box (62) with the groove of the honeycomb denitration catalyst plate (73) just removed, and then remove the strong magnetic plate (623). The new honeycomb denitration catalyst plate (73) will slowly move downward to complete the replacement.

2. The boiler flue gas full load denitration device according to claim 1, characterized in that: An exhaust pipe (23) is provided at one end of the bronchus A (21) and the bronchus B (22), and a drain pipe A (24), a drain pipe B (25) and a processing assembly (26) are provided at the lower ends of the bronchus A (21) and the bronchus B (22), wherein the catalytic assembly (7) in the bronchus B (22) is located between the external pump body (64) and the processing assembly (26).

3. The boiler flue gas full load denitration device according to claim 2, characterized in that: The treatment assembly (26) comprises a treatment box (261) arranged at the lower ends of the bronchus A (21) and the bronchus B (22), a nozzle (262) arranged at the upper end of the treatment box (261), and an inclined plate (263) arranged at one side of the upper end of the treatment box (261); the upper end of the treatment box (261) passes through the inner walls of the bronchus A (21) and the bronchus B (22) and is located inside the bronchus A (21) and the bronchus B (22); the nozzle (262) and the inclined plate (263) are arranged at the lower ends of the bronchus A (21) and the bronchus B (22); 63) is also located in bronchus A (21) and bronchus B (22), an external pipe is provided on one side of the treatment box (261), liquid urea is contained in the treatment box (261) at the lower end of bronchus A (21), and ammonia water is contained in the treatment box (261) at the lower end of bronchus B (22), a plurality of groups of nozzles (262) are provided, and connecting pipes are provided at the lower ends of the plurality of groups of nozzles (262), a water pump is provided at one end of the connecting pipe, and one end of the water pump is connected to the treatment box (261).

4. The boiler flue gas full load denitration device according to claim 3, characterized in that: Both the bronchus A (21) and the bronchus B (22) are provided with an anti-touch component (8), and the position of the anti-touch component (8) corresponds to that of the processing component (26).

5. The boiler flue gas full load denitration device according to claim 4, characterized in that: The anti-touch assembly (8) comprises an elastic block (82) arranged on the upper top wall of the bronchus A (21) and the bronchus B (22), and an inclined steel plate (81) arranged at the lower end of the elastic block (82). A wall groove A (83) is provided on the outer surface of the elastic block (82). A wall rod A (84) is rotatably provided inside the wall groove A (83). An impeller (85) is provided on the outer surface of the wall rod A (84).

6. The boiler flue gas full load denitration device according to claim 5, characterized in that: A wall groove B (86) is further provided on the outer surface of the elastic block (82), a wall rod B (861) is rotatably provided inside the wall groove B (86), a rolling wheel (862) is provided on the outer surface of the wall rod B (861), one end of the wall rod B (861) is connected to the wall rod A (84), a mounting groove (811) is provided on one side of the inclined steel plate (81), the mounting groove (811) is connected to the wall groove B (86), an elastic steel sheet (812) is provided inside the mounting groove (811), and the elastic steel sheet (812) is opposite to the rolling wheel (862).

7. The boiler flue gas full load denitration device according to claim 6, characterized in that: Two groups of wall grooves A (83) are provided, respectively located on both sides of the wall groove B (86). An elastic cover (87) is provided on the outer surface of the inclined steel plate (81), and one end of the elastic cover (87) is connected to the upper top wall of the bronchus A (21) or the bronchus B (22).

8. The boiler flue gas full load denitration device according to claim 7, characterized in that: A controller (5) is provided on the outer surface of the main air intake pipe (1), and monitoring modules (9) are provided inside the main air intake pipe (1) and the auxiliary air intake pipe (2). The monitoring modules (9) include a flue gas temperature monitoring unit (91) and a nitrogen oxide concentration monitoring unit (92) provided on the inner walls of the main air intake pipe (1) and the auxiliary air intake pipe (2). The monitoring module (9) is connected to the controller (5) by signals. Four groups of flue gas temperature monitoring units (91) and four groups of nitrogen oxide concentration monitoring units (92) are provided respectively, wherein two groups of flue gas temperature monitoring units (91) and two groups of nitrogen oxide concentration monitoring units (92) are provided in the main air intake pipe (1), and one group of flue gas temperature monitoring units (91) and one group of nitrogen oxide concentration monitoring units (92) are provided in the bronchus A (21) and the bronchus B (22).

9. The boiler flue gas full load denitration device according to claim 8, characterized in that: The controller (5) is provided with a main control module (51) inside, the main control module (51) is signal-connected to a coordinate axis establishment module (52), the coordinate axis establishment module (52) is signal-connected to a signal receiving module (53), the signal receiving module (53) is signal-connected to a monitoring point display module (54), the monitoring point display module (54) is signal-connected to a monitoring object marking module (55), the monitoring object marking module (55) is signal-connected to a monitoring data display module (56), the monitoring data display module (56) is signal-connected to a data change display module (57), and the monitoring module (9) is signal-connected to the signal receiving module (53).

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