Boiler and kiln flue gas SCR denitration device

Abstract

The utility model discloses a kind of boiler and SCR denitration device of kiln flue gas, including support table, the upper surface of support table is equipped with box, the inside of box is equipped with two groups of second sliding seat, the inside of each group second sliding seat is slidably installed with filter plate, the inside of box is equipped with two groups of electric slide rail, the outer surface of each group electric slide rail is slidably installed with first sliding seat, the particulate matter and impurity in gas are filtered by the filter plate of being set, effectively remove the particulate matter and impurity in gas, the surface of filter plate is cleaned by motor driving brush roller, cooperate electric slide rail drive sliding seat to move, make brush roller move back and forth on the surface of filter plate, effectively remove the dust and impurity on the surface of filter plate, prevent blockage, maintain higher filtration efficiency, reduce the pollution risk of particulate matter to catalyst, avoid catalyst activity decline, guarantee the sufficient contact of NOx in flue gas and catalyst, improve denitration efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas denitrification technology, specifically relating to an SCR denitrification device for boiler and kiln flue gas. Background Technology

[0002] When fossil fuels (such as coal, oil, and natural gas) are burned with air at high temperatures, they produce large amounts of NOx, which has become one of the main causes of a series of serious environmental pollution problems in my country, such as acid rain and photochemical smog. Controlling the boiler combustion process can reduce NOx emissions to some extent. However, when environmental protection requirements continue to increase and further reductions in NOx emission concentrations are needed, combustion process control technology is no longer sufficient. Existing control methods generally involve flue gas denitrification, which is a technology that can efficiently remove NOx from flue gas.

[0003] When thermal power plants burn fossil fuels such as coal, they produce large amounts of fly ash and slag. These solid particles are carried in the flue gas. When the flue gas passes through an SCR denitrification unit, large ash particles may deposit on the catalyst surface, forming a coating that hinders the contact between the catalyst and nitrogen oxides, thereby reducing denitrification efficiency. Long-term accumulation of ash may also lead to physical wear of the catalyst, shortening its service life.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide an SCR denitrification device for boiler and kiln flue gas, which can reduce the risk of particulate matter contamination of the catalyst and avoid the effect of catalyst activity reduction.

[0006] To achieve the above objectives, a specific embodiment of this utility model provides the following technical solution: an SCR denitrification device for boiler and kiln flue gas, comprising a support platform, a housing mounted on the upper surface of the support platform, two sets of second slide blocks mounted inside the housing, a filter plate slidably mounted inside each set of second slide blocks, two sets of electric slide rails mounted inside the housing, a first slide block slidably mounted on the outer surface of each set of electric slide rails, a brush roller rotatably mounted inside each first slide block, a motor mounted on the outer surface of each first slide block, and the output end of each motor passing through the first slide block and connected to the outer surface of the brush roller.

[0007] In one or more embodiments of this utility model, a dust collection cover is installed on the outer surface of each first slide, a collection box is installed on the outer surface of the box, a first fan is installed on the upper surface of the collection box, the output end of the first fan is connected to a first connecting pipe, the outer surface of the first connecting pipe is connected to two dust collection pipes, and the end of each dust collection pipe away from the first connecting pipe passes through the box and connects to the outer surface of the dust collection cover.

[0008] In one or more embodiments of this utility model, a second fan and a central box are installed on the upper surface of the support platform. A particulate matter sensor is installed inside the central box. The input end of the second fan is connected to a second connecting pipe. The end of the second connecting pipe away from the second fan is connected to the outer surface of the box. An air inlet pipe is connected to the upper surface of the box.

[0009] In one or more embodiments of this utility model, the output end of the second blower is connected to a conveying pipe, the end of the conveying pipe away from the second blower is connected to the outer surface of the central box, the outer surface of the central box is connected to a first return pipe and a connecting pipe, the outer surface of the connecting pipe is equipped with a first electrically controlled valve, the outer surface of the first return pipe is equipped with a second electrically controlled valve, the top end of the first return pipe is connected to the outer surface of the box, and the end of the connecting pipe away from the central box is connected to a reaction tank.

[0010] In one or more embodiments of this utility model, a plurality of plate catalysts are installed inside the reaction vessel, a sealing cover is installed on the upper surface of the reaction vessel, a discharge box is installed on the upper surface of the sealing cover, a gas sensor is installed inside the discharge box, a discharge pipe is connected to the upper surface of the discharge box, and a third electrically controlled valve is installed on the outer surface of the discharge pipe.

[0011] In one or more embodiments of this utility model, a support block is installed on the upper surface of the reaction vessel, a third fan is installed on the upper surface of the support block, the input end of the third fan is connected to the outer surface of the discharge box, the output end of the third fan is connected to a second return pipe, and the bottom end of the second return pipe is connected to the outer surface of the reaction vessel.

[0012] In one or more embodiments of this utility model, four support legs are installed on the bottom surface of the support platform, and a controller is installed on the upper surface of the support platform.

[0013] Compared with existing technologies, the SCR denitrification device for boiler and kiln flue gas of this utility model filters particulate matter and impurities in the gas through a filter plate, effectively removing particulate matter and impurities. A motor drives a brush roller to clean the surface of the filter plate, and an electric slide rail drives a sliding block to move the brush roller back and forth on the surface of the filter plate, effectively removing dust and impurities, preventing clogging, maintaining high filtration efficiency, reducing the risk of particulate matter contamination of the catalyst, avoiding catalyst activity decline, ensuring sufficient contact between NOx in the flue gas and the catalyst, and improving denitrification efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of an SCR denitrification device for boiler and kiln flue gas according to one embodiment of the present invention. Figure 2 This is a side view of an SCR denitrification device for boiler and kiln flue gas according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of an SCR denitrification device for boiler and kiln flue gas in one embodiment of the present invention. Figure 4 This is a schematic diagram of the internal structure of the housing in an SCR denitrification device for boiler and kiln flue gas according to one embodiment of the present invention. Figure 5 In one embodiment of this utility model, an SCR denitrification device for boiler and kiln flue gas is described. Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0016] Explanation of key figure labels: 1. Support platform; 2. Support legs; 3. Controller; 4. Housing; 5. Air inlet pipe; 6. Collection box; 7. First fan; 8. First connecting pipe; 9. Dust collection hood; 10. Electric slide rail; 11. First slide seat; 12. Motor; 13. Brush roller; 14. Filter plate; 15. Second slide seat; 16. Dust collection pipe; 17. Second connecting pipe; 18. Second fan; 19. Conveying pipe; 20. Centralized box; 21. First electrically controlled valve; 22. Second electrically controlled valve; 23. Connecting pipe; 24. First return pipe; 25. Reaction tank; 26. Sealing cover; 27. Third fan; 28. Second return pipe; 29. ​​Support block; 30. Plate catalyst; 31. Gas sensor; 32. Particulate matter sensor; 33. Discharge pipe; 34. Discharge box; 35. Third electrically controlled valve. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0018] like Figure 1-5 As shown, an SCR denitrification device for boiler and kiln flue gas in one embodiment of the present invention includes a support platform 1, a housing 4 mounted on the upper surface of the support platform 1, two sets of second slides 15 mounted inside the housing 4, a filter plate 14 slidably mounted inside each set of second slides 15, two sets of electric slide rails 10 mounted inside the housing 4, a first slide 11 slidably mounted on the outer surface of each set of electric slide rails 10, a brush roller 13 rotatably mounted inside each first slide 11, a motor 12 mounted on the outer surface of each first slide 11, and the output end of each motor 12 passing through the first slide 11 and connected to the outer surface of the brush roller 13.

[0019] Each first slide 11 is equipped with a dust collection hood 9 on its outer surface, and a collection box 6 is installed on the outer surface of the housing 4. A first fan 7 is installed on the upper surface of the collection box 6. The output end of the first fan 7 is connected to a first connecting pipe 8. Two dust collection pipes 16 are connected to the outer surface of the first connecting pipe 8. The end of each dust collection pipe 16 away from the first connecting pipe 8 passes through the housing 4 and connects to the outer surface of the dust collection hood 9. Specifically, through the combined use of the first fan 7 and the dust collection pipes 16, the cleaned particles and impurities can be extracted to avoid the accumulation of particles and make the cleaning more thorough.

[0020] A second fan 18 and a central collection box 20 are mounted on the upper surface of the support platform 1. A particulate matter sensor 32 is installed inside the central collection box 20. The input end of the second fan 18 is connected to a second connecting pipe 17. The end of the second connecting pipe 17 away from the second fan 18 is connected to the outer surface of the box 4. An air inlet pipe 5 is connected to the upper surface of the box 4. The output end of the second fan 18 is connected to a conveying pipe 19. The end of the conveying pipe 19 away from the second fan 18 is connected to the outer surface of the central collection box 20. A first return pipe 24 and a connecting pipe 23 are connected to the outer surface of the central collection box 20. A first electrically controlled valve 21 is installed, and a second electrically controlled valve 22 is installed on the outer surface of the first return pipe 24. The top end of the first return pipe 24 is connected to the outer surface of the housing 4. The end of the connecting pipe 23 away from the central box 20 is connected to the reaction tank 25. Specifically, the particulate matter concentration of the gas in the central box 20 is monitored in real time by the particulate matter sensor 32. If it does not meet the standard, the first electrically controlled valve 21 is closed and the second electrically controlled valve 22 is opened. The gas that does not meet the standard flows back into the housing 4 through the first return pipe 24 for secondary filtration to ensure that the particulate matter in the flue gas is effectively removed and to avoid subsequent clogging of the catalyst.

[0021] In one or more embodiments of this utility model, a plurality of plate catalysts 30 are installed inside the reaction vessel 25. A sealing cover 26 is installed on the upper surface of the reaction vessel 25, and a discharge box 34 is installed on the upper surface of the sealing cover 26. A gas sensor 31 is installed inside the discharge box 34. A discharge pipe 33 is connected to the upper surface of the discharge box 34. A third electrically controlled valve 35 is installed on the outer surface of the discharge pipe 33. A support block 29 is installed on the upper surface of the reaction vessel 25, and a third blower 27 is installed on the upper surface of the support block 29. The input end of the third blower 27 is... The third blower 27 is connected to the outer surface of the discharge box 34. The output end of the third blower 27 is connected to the second return pipe 28. The bottom end of the second return pipe 28 is connected to the outer surface of the reaction tank 25. Specifically, the gas concentration is monitored by the gas sensor 31 to see if it meets the standard. If it does, the gas is directly discharged through the discharge pipe 33. If it does not meet the standard, the controller 3 closes the third electric control valve 35 and starts the third blower 27. The gas that does not meet the standard is sent back to the reaction tank 25 through the second return pipe 28 for secondary denitrification treatment. The final emission meets the standard through cyclic denitrification.

[0022] In one or more embodiments of this utility model, four support legs 2 are installed on the bottom surface of the support platform 1, and a controller 3 is installed on the upper surface of the support platform 1.

[0023] Working Principle: During operation, the second fan 18 is started via controller 3, using the second connecting pipe 17 to drive the housing 4 and the inlet pipe 5 to extract the flue gas generated by the boiler or kiln. After entering the housing 4, the flue gas undergoes preliminary filtration through the filter plate 14 to remove large particles of ash and impurities. The filtered gas is then transported to the central collection box 20 via the conveying pipe 19. The particulate matter concentration in the central collection box 20 is monitored in real time by the particulate matter sensor 32 installed inside. If the concentration is below the standard, controller 3 closes the first solenoid valve 21 and opens the second solenoid valve 22. The gas that does not meet the standard flows back into the housing 4 through the first return pipe 24 for secondary filtration. This cycle ensures that particulate matter in the flue gas is effectively removed, preventing catalyst blockage. If the particulate matter concentration meets the standard, controller 3 closes the second solenoid valve 22 and opens the first solenoid valve 21. The gas is then transported to the reaction tank 25 through the connecting pipe 23. The plate catalyst 30 inside 25 performs SCR denitrification treatment on the gas. The treated gas enters the interior of the emission box 34. The gas concentration is monitored by the gas sensor 31 to see if it meets the standard. If it does, the gas is directly discharged through the emission pipe 33. If it does not meet the standard, the controller 3 closes the third electric control valve 35 and starts the third fan 27. The gas that does not meet the standard is sent back to the reaction tank 25 for secondary denitrification treatment through the second return pipe 28. The final emission meets the standard through the circulation denitrification. When the surface of the filter plate 14 is full of impurities, the motor 12 is started to drive the brush roller 13 to clean the surface of the filter plate 14. The electric slide rail 10 drives the first slide seat 11 to move the brush roller 13 back and forth on the surface of the filter plate 14 to ensure thorough cleaning and maintain filtration efficiency. During the cleaning process, the first fan 7 is started to suck the impurities into the collection box 6 through the first connecting pipe 8 and the dust suction pipe 16. The collection box 6 stores the impurities for subsequent cleaning.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An SCR denitrification device for boiler and kiln flue gas, characterized in that, The device includes a support platform, on the upper surface of which a housing is mounted. Inside the housing are two sets of second slides, each set of which has a filter plate slidably mounted inside. Inside the housing are two sets of electric slide rails, each set of which has a first slide slidably mounted on its outer surface. Inside each first slide is a brush roller rotatably mounted, and on the outer surface of each first slide is a motor. The output end of each motor passes through the first slide and connects to the outer surface of the brush roller.

2. The SCR denitrification device for boiler and kiln flue gas according to claim 1, characterized in that, Each of the first slides is equipped with a dust collection cover on its outer surface. A collection box is installed on the outer surface of the housing. A first fan is installed on the upper surface of the collection box. The output end of the first fan is connected to a first connecting pipe. Two dust collection pipes are connected to the outer surface of the first connecting pipe. The end of each dust collection pipe away from the first connecting pipe passes through the housing and connects to the outer surface of the dust collection cover.

3. The SCR denitrification device for boiler and kiln flue gas according to claim 1, characterized in that, A second fan and a central box are installed on the upper surface of the support platform. A particulate matter sensor is installed inside the central box. The input end of the second fan is connected to a second connecting pipe. The end of the second connecting pipe away from the second fan is connected to the outer surface of the box. An air inlet pipe is connected to the upper surface of the box.

4. The SCR denitrification device for boiler and kiln flue gas according to claim 3, characterized in that, The output end of the second blower is connected to a conveying pipe. The end of the conveying pipe away from the second blower is connected to the outer surface of the central box. The outer surface of the central box is connected to a first return pipe and a connecting pipe. A first electrically controlled valve is installed on the outer surface of the connecting pipe. A second electrically controlled valve is installed on the outer surface of the first return pipe. The top end of the first return pipe is connected to the outer surface of the box. The end of the connecting pipe away from the central box is connected to a reaction tank.

5. The SCR denitrification device for boiler and kiln flue gas according to claim 4, characterized in that, The reaction vessel is equipped with multiple plate catalysts. A sealing cover is installed on the upper surface of the reaction vessel. An exhaust box is installed on the upper surface of the sealing cover. A gas sensor is installed inside the exhaust box. An exhaust pipe is connected to the upper surface of the exhaust box. A third electrically controlled valve is installed on the outer surface of the exhaust pipe.

6. The SCR denitrification device for boiler and kiln flue gas according to claim 5, characterized in that, A support block is installed on the upper surface of the reaction vessel, and a third fan is installed on the upper surface of the support block.

7. The SCR denitrification device for boiler and kiln flue gas according to claim 6, characterized in that, The input end of the third blower is connected to the outer surface of the discharge box, and the output end of the third blower is connected to the second return pipe. The bottom end of the second return pipe is connected to the outer surface of the reaction vessel.

8. The SCR denitrification device for boiler and kiln flue gas according to claim 1, characterized in that, The support platform has four support legs installed on its bottom surface and a controller installed on its upper surface.

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