Flue gas water curtain type dust removal, desulfurization and denitrification device for coal-fired boiler and its denitrification method

Abstract

The present invention provides a flue gas water curtain type dust removal, desulfurization and denitration device for a coal-fired boiler and a denitration method thereof, belonging to the technical field of boiler flue gas treatment; it includes a treatment chamber with an air inlet and an air outlet respectively opened at both ends. Inside the treatment chamber, a dust filtering component, a water curtain main body, an electron beam radiation main body and an absorption filter screen are sequentially installed from the air inlet to the air outlet. The dust filtering component includes three filter plates adapted to the inner wall of the treatment chamber, and a dust collecting hopper is installed at the bottom of the treatment chamber. By setting a cleaning component and a driving component, when the filter plate needs to be cleaned, the driving wheel is driven to rotate reciprocally by a reduction motor. Under the action of a tensioning wheel and a supporting wheel, the driving wheel drives the transmission belt to make a reciprocating rotary motion. During this process, the cleaning component horizontally sweeps across the filtering side of the filter plate, and the transmission belt continuously stretches and folds. This setting can effectively prevent the dust entering the treatment chamber from contacting the transmission belt, ensuring the service life of the driving component.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler flue gas treatment, and particularly relates to a water curtain type dust removal, desulfurization and denitrification device for coal-fired boiler flue gas and a denitrification method thereof. Background Art

[0002] Coal-fired boilers are still one of the important sources of urban air pollution in China. Usually, a water curtain type dust removal, desulfurization and denitrification device is used to treat flue gas for desulfurization and denitrification. For example, a Chinese patent with the authorization announcement number CN114931817B discloses a water curtain type dust removal, desulfurization and denitrification device for coal-fired boiler flue gas and a denitrification method. By rotating the runner, the flue gas with dust is dispersed and distributed, avoiding the aggregation and filtration of dust in the flue gas at the same position, which affects the discharge treatment efficiency. At the same time, a dust cleaning structure is provided that can clean both sides of multiple filter meshes on the filter mesh, avoiding the problem of dust accumulation inward caused by cleaning only one side of the filter mesh, effectively ensuring the removal effect of dust in the flue gas and the flow efficiency of the flue gas, and ensuring the uniformity of the flue gas flow, and improving the dust removal, desulfurization and denitrification effects of the flue gas to a certain extent.

[0003] Although the above device improves the removal effect and flow efficiency of dust in the flue gas by setting a dispersion mechanism and multiple filter meshes, the driving components of the dust cleaning structure used therein are exposed in the desulfurization, denitrification and dust removal chamber, and a large amount of dust is dispersed inside the dust removal chamber, which is likely to increase the frictional loss during the operation of the driving components, increase the clearance between the driving components, affect the movement stability of the driving components, and is not conducive to the long-term and stable use of the dust cleaning structure. Therefore, the present application provides a water curtain type dust removal, desulfurization and denitrification device for coal-fired boiler flue gas and a denitrification method thereof to meet the requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a water curtain type dust removal, desulfurization and denitrification device for coal-fired boiler flue gas and a denitrification method thereof to solve the problems mentioned in the above background art.

[0005] To solve the above technical problems, the present invention provides the following technical solutions:

[0006] A water curtain type dust removal, desulfurization and denitrification device for coal-fired boiler flue gas, including a treatment chamber with an air inlet and an air outlet respectively opened at both ends. Inside the treatment chamber, a dust filtration component, a water curtain main body, an electron beam radiation main body and an absorption filter mesh are sequentially installed from the air inlet to the air outlet. The dust filtration component includes three filter plates adapted to the inner wall of the treatment chamber. A dust collection hopper is installed at the bottom of the treatment chamber, and a plurality of dust outlet grooves communicating with the dust collection hopper are opened at the bottom of the treatment chamber. The dust falling on the filter plates can enter the dust collection hopper through the dust outlet grooves. Four cleaning components for cleaning the filter plates are installed inside the treatment chamber, and a driving component for driving the plurality of cleaning components to move horizontally is installed on the treatment chamber.

[0007] Preferably, the driving component includes a reduction motor installed on one side of the processing chamber. Two support wheels are rotatably connected to one side of the processing chamber. A telescopic rod is installed on the other side of the processing chamber. A support frame is installed at the telescopic end of the telescopic rod. Two tension wheels are rotatably connected to the support frame. A driving wheel is installed at the output end of the reduction motor. The driving wheel, the tension wheels and the support wheels are sleeved with the same transmission belt. The transmission belt penetrates the processing chamber and is semi-surrounded in an S shape around three adjacent sides of the filter plate. The support wheels support the transmission belt to prevent the transmission belt from overlapping at the position close to the driving wheel. The cleaning component is installed on the transmission belt; folding sleeves sleeved outside the transmission belt are installed on both sides of the cleaning component. One side of the folding sleeve away from the cleaning component is connected to the inner wall of the processing chamber.

[0008] Preferably, the cleaning component includes a connection box installed on the transmission belt. A first cleaning box and a second cleaning box are respectively slidably connected to opposite sides of the connection box. Brush hairs are installed on one side of the first cleaning box and the second cleaning box away from each other.

[0009] Preferably, a plurality of second placement grooves are formed on one side of the first cleaning box close to the connection box and on one side of the second cleaning box close to the connection box. Second springs are sleeved in the second placement grooves. One end of the second spring away from the first cleaning box or the second cleaning box abuts against the connection box.

[0010] Preferably, a second through hole adapted to the transmission belt is formed in the connection box. The second through hole penetrates the connection box. An installation groove is formed on one side of the connection box. A cover plate is installed in the installation groove. A first cavity communicating with the second through hole is formed at the adjacent position of the connection box and the cover plate. A first placement groove is formed at the bottom of the first cavity. An adjusting mechanism for adjusting the relative position between the connection box and the transmission belt is installed on the connection box; the adjusting mechanism includes a first spring sleeved in the first placement groove. A first sliding rod is slidably connected in the first placement groove. The bottom of the first sliding rod abuts against the top of the first spring. A limiting plate is installed at the top of the first sliding rod. The top of the limiting plate is adapted to the bottom of the transmission belt. A rough surface is provided on the top of the limiting plate. A first through hole is formed on one side of the first sliding rod. A first inclined surface is formed at the bottom of the first through hole. A second sliding rod penetrating and extending into the first placement groove is slidably connected to the cover plate. A second inclined surface adapted to the first inclined surface is formed on one side of the second sliding rod close to the first sliding rod. The width of the second sliding rod is smaller than the width of the first through hole. One end of the second sliding rod away from the first sliding rod is located outside the cover plate and can be driven by the transmission belt to abut against the side wall of the processing chamber.

[0011] Preferably, a first groove is formed on one side of the connection box close to the first cleaning box, the first cleaning box is slidably sleeved with the first groove, a second groove is formed on one side of the second cleaning box close to the connection box, the connection box is slidably sleeved with the second groove, and the second placement groove on the second cleaning box is formed in the second groove.

[0012] Preferably, both sides of the first cavity penetrate through the connection box. A first movable groove is formed on one side of the first cleaning box close to the connection box. An extension plate is arranged on one side of the second cleaning box close to the connection box. A second movable groove is formed on one side of the second cleaning box close to the connection box. A plurality of limiting grooves are evenly formed at the bottom of the transmission belt, at the top of the first movable groove, at the top of the second movable groove and at the bottom of the extension plate. A plurality of limiting columns adapted to the limiting grooves are installed on the limiting plate. Both sides of the limiting plate penetrate through the first cavity and extend into the first movable groove and the second movable groove respectively.

[0013] Preferably, the top of the limiting column is conical, chamfers are formed at the bottoms of the limiting grooves, and the chamfer edges of adjacent limiting grooves are adjacent to each other.

[0014] Preferably, a stepped groove penetrating through the cover plate is formed on the cover plate. The second sliding rod is slidably sleeved with the small hole of the stepped groove. A limiting ring is installed on the second sliding rod. The large hole of the stepped groove faces the first sliding rod, and the limiting ring is slidably sleeved with the large hole of the stepped groove.

[0015] Preferably, three partition plates are installed at the bottom of the dust collection hopper. The partition plates divide the interior of the dust collection hopper into a plurality of non-communication empty bins, and the tops of the partition plates abut against the bottom of the filter plate.

[0016] A using method of the flue gas water curtain type dust removal, desulfurization and denitration device for coal-fired boilers, applying the above flue gas water curtain type dust removal, desulfurization and denitration device for coal-fired boilers, includes the following steps:

[0017] S1: After the flue gas enters through the air inlet, it is preliminarily dust-removed through the filtering component, and then adsorbed and dust-removed through the water curtain main body. Then, through the electron beam radiation main body, sulfur dioxide and nitrogen oxides in the flue gas are converted into ammonium sulfate and ammonium nitrate. A mesh cloth soaked with alkaline liquid is installed on the surface of the absorption filter. When the flue gas with ammonium sulfate, ammonium nitrate, sulfuric acid and nitric acid passes through the absorption filter, desulfurization and denitration are carried out. The treated flue gas is discharged through the air outlet.

[0018] S2: When it is necessary to clean the filter plate, the driving wheel is driven to rotate reciprocally by the reduction motor. Under the action of the tensioning wheel and the supporting wheel, the driving wheel drives the transmission belt to make a reciprocating rotary motion. During this process, the cleaning component horizontally sweeps the filtering side of the filter plate, and the transmission belt continuously stretches and folds.

[0019] S3: When cleaning the filter plate, the dust falling from the filter plate enters the dust collecting hopper through the dust outlet slot.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] In the above scheme, by setting up a cleaning component and a driving component, when the filter plate needs to be cleaned, the driving wheel is driven to rotate back and forth by the reduction motor, and the driving wheel drives the transmission belt to make reciprocating rotation motion under the action of the tensioning wheel and the support wheel. During this process, the cleaning component sweeps the filtering side of the filter plate horizontally, and the transmission belt continues to stretch and fold. This setting can effectively prevent dust entering the processing chamber from contacting the transmission belt, thereby ensuring the service life of the driving component.

[0022] By setting the second spring, when the bristles on the first cleaning box and the second cleaning box are worn due to long-term use, the first cleaning box and the second cleaning box automatically move toward the side close to the filter plate under the elastic force of the second spring until the bristles come into contact with the cleaning side surface of the filter plate and stop, thereby ensuring the cleaning effect of the cleaning components.

[0023] By setting up cleaning components, driving components and adjusting mechanisms, the relative position of the connecting box and the transmission belt can be replaced without dismantling the processing chamber, cleaning components, driving components and adjusting mechanisms, thereby changing the contact position of the transmission belt with the driving wheel, tensioning wheel and supporting wheel, avoiding friction between the driving wheel, tensioning wheel and supporting wheel and the same section of the transmission belt for a long time, thereby reducing the service life of the transmission belt, improving the wear consistency at different positions of the transmission belt, and extending the service life of the transmission belt.

[0024] By providing the limiting groove and the limiting column, the transmission belt and the connecting box are prevented from sliding against each other due to insufficient friction, thereby increasing the friction loss of the transmission belt and the connecting box. At the same time, it can also avoid that the bristles on the first cleaning box and the second cleaning box always maintain a large force to squeeze the filter plate under the elastic force of the second spring, thereby slowing down the wear of the bristles and the filter plate and increasing their service life. At the same time, it also avoids that when the transmission belt drives the first cleaning box and the second cleaning box through the connecting box for cleaning movement, the bristles on the first cleaning box and the second cleaning box are subjected to the reaction force of the filter plate or impurities on the filter plate, causing the first cleaning box and the second cleaning box to move to the side away from the filter plate, thereby reducing the use stability of the first cleaning box and the second cleaning box and affecting the cleaning effect of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable one skilled in the relevant art to make and use the present disclosure.

[0026] Figure 1Schematic diagram of the three-dimensional structure of the flue gas water curtain type dust removal, desulfurization and denitrification device for coal-fired boilers from the first perspective;

[0027] Figure 2 Schematic diagram of the three-dimensional structure of the flue gas water curtain type dust removal, desulfurization and denitrification device for coal-fired boilers from the second perspective;

[0028] Figure 3 Schematic diagram of the three-dimensional structure of the partial sectional view of the flue gas water curtain type dust removal, desulfurization and denitrification device for coal-fired boilers;

[0029] Figure 4 Schematic diagram of the enlarged three-dimensional structure after the cleaning component and the driving component are assembled;

[0030] Figure 5 Schematic diagram of the enlarged three-dimensional structure of the partial sectional view after the cleaning component and the adjusting mechanism are assembled;

[0031] Figure 6 For Figure 5 Enlarged structure diagram at position A in;

[0032] Figure 7 Schematic diagram of the enlarged three-dimensional structure of the connection box;

[0033] Figure 8 Schematic diagram of the enlarged three-dimensional structure of the first cleaning box;

[0034] Figure 9 Schematic diagram of the enlarged three-dimensional structure of the second cleaning box;

[0035] Figure 10 Schematic diagram of the enlarged three-dimensional structure of the partial sectional view after the connection box and the adjusting mechanism are assembled;

[0036] Figure 11 For Figure 10 Enlarged structure diagram at position B in;

[0037] Figure 12 Schematic diagram of the enlarged three-dimensional structure after the first sliding rod and the limiting plate are assembled.

[0038] [Reference Signs]

[0039] 1. Processing bin; 2. Filter plate; 3. Cleaning component; 4. Driving component; 5. Adjusting mechanism; 6. Reducing motor; 7. Driving wheel; 8. Tensioning wheel; 9. Supporting wheel; 10. Transmission belt; 11. Telescopic rod; 12. Support frame; 13. Folding sleeve; 14. Connection box; 15. First cleaning box; 16. Second cleaning box; 17. First cavity; 18. First placement groove; 19. First spring; 20. First sliding rod; 21. Limiting plate; 22. First moving groove; 23. Second moving groove; 24. Extension plate; 25. Limiting groove; 26. Limiting column; 27. First through hole; 28. First inclined surface; 29. Second sliding rod; 30. Second inclined surface; 31. Cover plate; 32. Limiting ring; 33. Step groove; 34. Second placement groove; 35. Second spring; 36. Installation groove; 37. First groove; 38. Second groove; 39. Dust collecting hopper; 40. Dust outlet groove; 41. Second through hole.

[0040] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device, and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments, and the adjustments or modifications still fall within the scope of the appended claims. Detailed implementation manners

[0041] The following describes in detail the flue gas water curtain type dust removal, desulfurization, and denitrification device and its denitrification method provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention.

[0042] It should be pointed out that in the specification, when referring to "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc., it indicates that the described embodiment may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. Additionally, when combining an embodiment to describe a specific feature, structure, or characteristic, implementing such a feature, structure, or characteristic in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0043] Generally, terms can be understood at least in part from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood to not necessarily be intended to convey an exclusive set of factors, but rather, depending at least in part on the context, can alternatively allow for other factors that are not necessarily explicitly described.

[0044] As Figures 1-3 shown, embodiments of the present invention provide a flue gas water curtain type dust removal, desulfurization and denitrification device for a coal-fired boiler and a denitrification method thereof, including a treatment chamber 1 having an air inlet and an air outlet respectively opened at both ends. Inside the treatment chamber 1, a dust filtration component, a water curtain main body (not shown in the figure), an electron beam radiation main body (not shown in the figure), and an absorption filter screen (not shown in the figure) are sequentially installed from the air inlet to the air outlet. After the flue gas enters through the air inlet, it is initially dust-removed by passing through the filtration component, then adsorbed and dust-removed by the water curtain main body, and then the sulfur dioxide and nitrogen oxides in the flue gas are converted into ammonium sulfate and ammonium nitrate by the electron beam radiation main body. A mesh cloth soaked with an alkaline liquid is installed on the surface of the absorption filter screen. When the flue gas with ammonium sulfate, ammonium nitrate, sulfuric acid, and nitric acid passes through the absorption filter screen, desulfurization and denitrification are carried out. The treated flue gas is discharged through the air outlet. The dust filtration component includes three filter plates 2 adapted to the inner wall of the treatment chamber 1. A dust collection hopper 39 is installed at the bottom of the treatment chamber 1, and a plurality of dust outlet grooves 40 communicating with the dust collection hopper 39 are opened at the bottom of the treatment chamber 1. The dust falling on the filter plate 2 can enter the dust collection hopper 39 through the dust outlet grooves 40. By providing the dust collection hopper 39 and the dust outlet grooves 40, it is avoided that the dust falling on the filter plate 2 accumulates on both sides of the bottom of the filter plate 2, affecting the filtration effect of the filter plate 2.

[0045] As Figure 3 and Figure 4As shown in the figure, four cleaning components 3 for cleaning the filter plate 2 are installed in the processing bin 1, and a driving component 4 for driving the multiple cleaning components 3 to move horizontally is installed on the processing bin 1; the driving component 4 includes a reduction motor 6 installed on one side of the processing bin 1, two support wheels 9 are rotatably connected to one side of the processing bin 1, a telescopic rod 11 is installed on the other side of the processing bin 1, a support frame 12 is installed at the telescopic end of the telescopic rod 11, two tension wheels 8 are rotatably connected to the support frame 12, a driving wheel 7 is installed at the output end of the reduction motor 6, and a same transmission belt 10 is sleeved on the driving wheel 7, the tension wheels 8 and the support wheels 9. The telescopic rod 11 can be an electric telescopic rod or a manually adjustable telescopic rod in the prior art. By adjusting the distance between the telescopic end of the telescopic rod 11 and the processing bin 1, the tension of the transmission belt 10 is adjusted to ensure stable transmission between the reduction motor 6 and the transmission belt 10. The transmission belt 10 passes through the processing bin 1 and is in an S shape to semi-surround three adjacent sides of the filter plate 2. The support wheel 9 supports the transmission belt 10 to prevent the transmission belt 10 from overlapping at the position close to the driving wheel 7, thereby avoiding increased wear caused by partial overlap of the transmission belt 10 and affecting the service life of the transmission belt 10. The cleaning component 3 is installed on the transmission belt 10; folding sleeves 13 sleeved outside the transmission belt 10 are installed on both sides of the cleaning component 3, and one side of the folding sleeve 13 away from the cleaning component 3 is connected to the inner wall of the processing bin 1.

[0046] By setting the cleaning component 3 and the driving component 4, when it is necessary to clean the filter plate 2, the reduction motor 6 drives the driving wheel 7 to rotate reciprocally, and the driving wheel 7 drives the transmission belt 10 to make a reciprocating rotary motion under the action of the tension wheels 8 and the support wheels 9. During this process, the cleaning component 3 horizontally sweeps the filtering side of the filter plate 2, and the transmission belt 10 continuously extends and folds. Such a setting can effectively prevent the dust entering the processing bin 1 from contacting the transmission belt 10 and ensure the service life of the driving component 4.

[0047] As Figure 3 and Figure 5 shown, the cleaning component 3 includes a connection box 14 installed on the transmission belt 10. Multiple transmission belts 10 can be provided and are arranged in parallel up and down. The connection box 14 can be connected to multiple transmission belts 10 to improve the movement stability of the connection box 14. The first cleaning box 15 and the second cleaning box 16 are respectively slidably connected to the opposite sides of the connection box 14. Brush hairs are installed on the sides of the first cleaning box 15 and the second cleaning box 16 away from each other. When the transmission belt 10 drives the first cleaning box 15 and the second cleaning box 16 to move horizontally reciprocally through the connection box 14, the filtering side surface of the filter plate 2 is cleaned by the brush hairs on the first cleaning box 15 and the second cleaning box 16. It is simple and convenient. Only the first cleaning box 15 or the second cleaning box 16 is provided on the outermost connection box 14 to avoid waste.

[0048] As Figure 5 、 Figures 7-10As shown, on the side of the first cleaning box 15 close to the connection box 14 and the side of the second cleaning box 16 close to the connection box 14, a plurality of second placement grooves 34 are provided. A second spring 35 is sleeved in the second placement groove 34. One end of the second spring 35 away from the first cleaning box 15 or the second cleaning box 16 abuts against the connection box 14. The advantage of this setting is that when the bristles on the first cleaning box 15 and the second cleaning box 16 are worn due to long-term use, under the elastic force of the second spring 35, the first cleaning box 15 and the second cleaning box 16 automatically move towards the side close to the filter plate 2 until the bristles abut against the cleaning side surface of the filter plate 2 and then stop, ensuring the cleaning effect of the cleaning component 3.

[0049] As Figure 5 , Figure 6 and Figure 11 shown, a second through hole 41 adapted to the transmission belt 10 is provided on the connection box 14. The second through hole 41 penetrates the connection box 14. An installation groove 36 is provided on one side of the connection box 14. A cover plate 31 is installed in the installation groove 36. A first cavity 17 communicating with the second through hole 41 is provided at the adjacent position of the connection box 14 and the cover plate 31. A first placement groove 18 is provided at the bottom of the first cavity 17. An adjusting mechanism 5 for adjusting the relative position between the connection box 14 and the transmission belt 10 is installed on the connection box 14; the adjusting mechanism 5 includes a first spring 19 sleeved in the first placement groove 18. A first sliding rod 20 is slidably connected in the first placement groove 18. The bottom of the first sliding rod 20 abuts against the top of the first spring 19. A limiting plate 21 is installed at the top of the first sliding rod 20. The top of the limiting plate 21 is adapted to the bottom of the transmission belt 10. A rough surface is provided at the top of the limiting plate 21. A first through hole 27 is provided on one side of the first sliding rod 20. A first inclined surface 28 is provided at the bottom of the first through hole 27. A second sliding rod 29 penetrating and extending into the first placement groove 18 is slidably connected to the cover plate 31. A second inclined surface 30 adapted to the first inclined surface 28 is provided on the side of the second sliding rod 29 close to the first sliding rod 20. The width of the second sliding rod 29 is smaller than the width of the first through hole 27. Under normal conditions, the end of the second sliding rod 29 away from the first sliding rod 20 is located outside the cover plate 31 and can be driven by the transmission belt 10 to abut against the side wall of the processing chamber 1. It should be noted that the first through holes 27 on adjacent connection boxes 14 are provided on the opposite sides of the adjacent connection boxes 14.

[0050] By setting the cleaning component 3, the driving component 4 and the adjusting mechanism 5, during the process of the driving component 4 driving the cleaning component 3 to clean the filter plate 2, the second sliding rod 29 does not contact the inner wall of the treatment chamber 1. After it works for a certain period of time, the reduction motor 6 can continue to drive the transmission belt 10 to drive the connection box 14 to move, and make the second sliding rod 29 contact the inner wall of the treatment chamber 1. At this time, the second sliding rod 29 slides and squeezes the first inclined surface 28 through the second inclined surface 30, so that the first sliding rod 20 drives the limiting plate 21 to move downward, so that the bottom of the limiting plate 21 is separated from the bottom of the transmission belt 10. In this state, the transmission belt 10 continues to rotate. Under the restriction of the inner wall of the treatment chamber 1, the connection box 14 remains in its original position, changing its relative position with the transmission belt 10. Subsequently, the reduction motor 6 drives the transmission belt 10 to act in the reverse direction. The transmission belt 10 drives the connection box 14 to move away from the inner wall of one side of the treatment chamber 1 through the friction with the inner wall of the second through hole 41. The second sliding rod 29 is separated from the treatment chamber 1. Under the elastic force of the first spring 19, the first sliding rod 20 resets and contacts the bottom of the transmission belt 10, and limits the connection box 14 at the current position of the transmission belt 10 through the friction provided by the rough surface. The advantage of this setting is that it can realize changing the relative position of the connection box 14 and the transmission belt 10 without removing the treatment chamber 1, the cleaning component 3, the driving component 4 and the adjusting mechanism 5, so as to realize the change of the contact position between the transmission belt 10 and the driving wheel 7, the tensioning wheel 8 and the supporting wheel 9, avoid the driving wheel 7, the tensioning wheel 8 and the supporting wheel 9 generating friction with the same section position of the transmission belt 10 for a long time, thereby reducing the service life of the transmission belt 10, improving the wear consistency of different positions of the transmission belt 10, and prolonging the service life of the transmission belt 10. It should be noted that during this process, the first sliding rod 20 also drives the second sliding rod 29 to reset through the first inclined surface 28 and the second inclined surface 30.

[0051] As Figures 7-9 shown, a first groove 37 is formed on one side of the connection box 14 close to the first cleaning box 15. The first cleaning box 15 is slidably sleeved with the first groove 37. A second groove 38 is formed on one side of the second cleaning box 16 close to the connection box 14. The connection box 14 is slidably sleeved with the second groove 38. The second placement groove 34 on the second cleaning box 16 is formed in the second groove 38. The advantage of this setting is that it improves the stability of the sliding connection between the connection box 14, the first cleaning box 15 and the second cleaning box 16. At the same time, the gap at the adjacent position of the connection box 14, the first cleaning box 15 and the second cleaning box 16 faces away from the air inlet side, and it can also effectively reduce the probability that the dust directly blown to the cleaning component 3 on the air inlet side enters the adjacent position between the connection box 14, the first cleaning box 15 and the second cleaning box 16 through the gap between the connection box 14, the first cleaning box 15 and the second cleaning box 16, reduce the wear at the adjacent position of the connection box 14, the first cleaning box 15 and the second cleaning box 16, and improve the use stability of the cleaning component 3.

[0052] As Figures 6-12 shown, both sides of the first cavity 17 penetrate through the connection box 14. A first movable groove 22 is formed on one side of the first cleaning box 15 close to the connection box 14. An extension plate 24 is arranged on one side of the second cleaning box 16 close to the connection box 14. A second movable groove 23 is formed on one side of the second cleaning box 16 close to the connection box 14. A plurality of limiting grooves 25 are evenly formed at the bottom of the transmission belt 10, at the top of the first movable groove 22, at the top of the second movable groove 23 and at the bottom of the extension plate 24. A plurality of limiting posts 26 adapted to the limiting grooves 25 are installed on the limiting plate 21. Both sides of the limiting plate 21 penetrate through the first cavity 17 and extend into the first movable groove 22 and the second movable groove 23 respectively.

[0053] By providing the limiting grooves 25 and the limiting posts 26, when the limiting plate 21 moves downward, the limiting posts 26 are disengaged from the limiting grooves 25. In this state, the first cleaning box 15 and the second cleaning box 16 can increase the distance from the connection box 14 through the second spring 35 and compensate for the gap between the brush hairs and the filter plate 2. When the limiting plate 21 is reset, the limiting grooves 25 are inserted into the limiting posts 26. At this time, the relative positions of the transmission belt 10, the connection box 14, the first cleaning box 15 and the second cleaning box 16 are fixed. The advantage of this setting is to avoid mutual sliding between the transmission belt 10 and the connection box 14 due to insufficient friction, increase the friction loss between the transmission belt 10 and the connection box 14, and at the same time avoid that under the elastic force of the second spring 35, the brush hairs on the first cleaning box 15 and the second cleaning box 16 always keep a large force pressing the filter plate 2, slow down the wear of the brush hairs and the filter plate 2, improve their service life, and at the same time avoid that when the transmission belt 10 drives the first cleaning box 15 and the second cleaning box 16 to perform a cleaning movement through the connection box 14, the brush hairs on the first cleaning box 15 and the second cleaning box 16 are affected by the reaction force of the filter plate 2 or the impurities on the filter plate 2, causing the first cleaning box 15 and the second cleaning box 16 to move away from the filter plate 2, reducing the use stability of the first cleaning box 15 and the second cleaning box 16 and affecting the cleaning effect of the filter plate 2.

[0054] As Figure 6 and Figure 12 shown, the top of the limiting post 26 is conical, and chamfers are formed at the bottom of the limiting grooves 25. The chamfered edges of adjacent limiting grooves 25 are adjacent to each other. The advantage of this setting is that when the limiting plate 21 moves upward, the limiting grooves 25 will not contact the flat surfaces at the bottom of the first movable groove 22, the second movable groove 23 or the transmission belt 10, but are directly inserted into the limiting posts 26 under the guidance of the chamfered edges of the limiting grooves 25, improving the insertion error tolerance of the limiting grooves 25 and the limiting posts 26.

[0055] As Figure 6 and Figure 11As shown, a stepped groove 33 penetrating the cover plate 31 is provided on the cover plate 31. The second sliding rod 29 is slidably sleeved in the small hole of the stepped groove 33. A limiting ring 32 is installed on the second sliding rod 29. The large hole of the stepped groove 33 faces the first sliding rod 20, and the limiting ring 32 is slidably sleeved in the large hole of the stepped groove 33. The advantage of this setting is to prevent the second sliding rod 29 from detaching from the cover plate 31 and affecting the use stability of the second sliding rod 29.

[0056] As Figure 3 shown, three partition plates (not shown in the figure) are installed at the bottom of the dust collection hopper 39. The partition plates divide the interior of the dust collection hopper 39 into multiple non - communicating empty compartments. The top of the partition plates abuts against the bottom of the filter plate 2. The advantage of this setting is to prevent part of the flue gas from directly bypassing the filter plate 2 through the gap between the filter plate 2 and the dust collection hopper 39 and entering the water curtain main body during the flue gas dust removal process of this device, thus ensuring the dust removal effect of this device.

[0057] The usage method of the flue gas water curtain type dust removal, desulfurization and denitrification device for coal - fired boilers, applying the above - mentioned flue gas water curtain type dust removal, desulfurization and denitrification device for coal - fired boilers, includes the following steps:

[0058] S1: After the flue gas enters through the air inlet, it is preliminarily dust - removed through the filtering component, and then adsorbed and dust - removed through the water curtain main body. Then, through the electron beam radiation main body, sulfur dioxide and nitrogen oxides in the flue gas are converted into ammonium sulfate and ammonium nitrate. A net cloth soaked with alkaline liquid is installed on the surface of the absorption filter screen. Desulfurization and denitrification are carried out when the flue gas with ammonium sulfate, ammonium nitrate, sulfuric acid and nitric acid passes through the absorption filter screen. The treated flue gas is discharged through the air outlet.

[0059] S2: When it is necessary to clean the filter plate 2, the reduction motor 6 drives the driving wheel 7 to rotate reciprocally. Under the action of the tensioning wheel 8 and the supporting wheel 9, the driving wheel 7 drives the transmission belt 10 to make a reciprocating rotary motion. During this process, the cleaning component 3 horizontally sweeps across the filtering side of the filter plate 2, and the transmission belt 10 continuously stretches and folds.

[0060] S3: When cleaning the filter plate 2, the dust falling from the filter plate 2 enters the dust collection hopper 39 through the dust outlet groove 40.

[0061] The technical solution provided by the present invention, by setting the cleaning component 3 and the driving component 4, when it is necessary to clean the filter plate 2, the reduction motor 6 drives the driving wheel 7 to rotate reciprocally. Under the action of the tensioning wheel 8 and the supporting wheel 9, the driving wheel 7 drives the transmission belt 10 to make a reciprocating rotary motion. During this process, the cleaning component 3 horizontally sweeps across the filtering side of the filter plate 2, and the transmission belt 10 continuously stretches and folds. This setting can effectively prevent the dust entering the treatment chamber 1 from contacting the transmission belt 10 and ensure the service life of the driving component 4.

[0062] When the bristles on the first cleaning box 15 and the second cleaning box 16 are worn due to long-term use, under the elastic force of the second spring 35, the first cleaning box 15 and the second cleaning box 16 automatically move towards the side close to the filter plate 2 until they stop when the bristles contact the cleaning side surface of the filter plate 2, ensuring the cleaning effect of the cleaning component 3.

[0063] By setting the cleaning component 3, the driving component 4 and the adjusting mechanism 5, during the process of the driving component 4 driving the cleaning component 3 to clean the filter plate 2, the second sliding rod 29 does not contact the inner wall of the treatment chamber 1. After it works for a certain period of time, the reduction motor 6 can continue to drive the transmission belt 10 to drive the connection box 14 to move, and make the second sliding rod 29 contact the inner wall of the treatment chamber 1. At this time, the second sliding rod 29 slides and squeezes the first inclined surface 28 through the second inclined surface 30, so that the first sliding rod 20 drives the limiting plate 21 to move downward, so that the bottom of the limiting plate 21 is separated from the bottom of the transmission belt 10. In this state, the transmission belt 10 continues to rotate. Under the restriction of the inner wall of the treatment chamber 1, the connection box 14 remains in its original position, changing its relative position with the transmission belt 10. Subsequently, the reduction motor 6 reversely drives the transmission belt 10 to act, and the transmission belt 10 drives the connection box 14 to move away from the inner wall of one side of the treatment chamber 1 through the friction with the inner wall of the second through hole 41. The second sliding rod 29 is separated from the treatment chamber 1. Under the elastic force of the first spring 19, the first sliding rod 20 resets and contacts the bottom of the transmission belt 10, and limits the connection box 14 at the current position of the transmission belt 10 through the friction provided by the rough surface. The advantage of this setting is that it can change the relative position of the connection box 14 and the transmission belt 10 without removing the treatment chamber 1, the cleaning component 3, the driving component 4 and the adjusting mechanism 5, so as to change the contact positions of the transmission belt 10 with the driving wheel 7, the tensioning wheel 8 and the supporting wheel 9, avoid the driving wheel 7, the tensioning wheel 8 and the supporting wheel 9 generating friction with the same section position of the transmission belt 10 for a long time, thereby reducing the service life of the transmission belt 10, improving the wear consistency of different positions of the transmission belt 10, and prolonging the service life of the transmission belt 10.

[0064] By setting the limit groove 25 and the limit post 26, when the limit plate 21 moves downward, the limit post 26 disengages from the limit groove 25. In this state, the first cleaning box 15 and the second cleaning box 16 can increase the distance from the connection box 14 through the second spring 35 and compensate for the gap between the brush bristles and the filter plate 2. After the limit plate 21 is reset, the limit groove 25 is inserted into the limit post 26. At this time, the relative positions of the transmission belt 10, the connection box 14, the first cleaning box 15 and the second cleaning box 16 are fixed. The advantage of this setting is to avoid the mutual sliding between the transmission belt 10 and the connection box 14 due to insufficient friction, increase the frictional loss between the transmission belt 10 and the connection box 14, and at the same time, it can also avoid that under the elastic force of the second spring 35, the brush bristles on the first cleaning box 15 and the second cleaning box 16 always maintain a large force to squeeze the filter plate 2, slow down the wear of the brush bristles and the filter plate 2, improve their service life, and also avoid that when the transmission belt 10 drives the first cleaning box 15 and the second cleaning box 16 to perform cleaning movement through the connection box 14, the brush bristles on the first cleaning box 15 and the second cleaning box 16 are affected by the reaction force of the filter plate 2 or the impurities on the filter plate 2, causing the first cleaning box 15 and the second cleaning box 16 to move away from the filter plate 2, reducing the use stability of the first cleaning box 15 and the second cleaning box 16 and affecting the cleaning effect of the filter plate 2.

[0065] The present invention covers any alternatives, modifications, equivalent methods and solutions made on the essence and scope of the present invention. In order to enable the public to have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0066] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. Flue gas water curtain type dust removal, desulfurization and denitrification device for coal-fired boilers, characterized in that, Comprising: A treatment chamber (1) with an air inlet and an air outlet respectively opened at both ends. Inside the treatment chamber (1), a dust filtering component, a water curtain main body, an electron beam radiation main body, and an absorption filter screen are sequentially installed from the air inlet to the air outlet. The dust filtering component includes three filter plates (2) adapted to the inner wall of the treatment chamber (1). Four cleaning components (3) for cleaning the filter plates (2) are installed inside the treatment chamber (1). A driving component (4) for driving the cleaning components (3) to move horizontally is installed on the treatment chamber (1); The driving component (4) includes a reduction motor (6) installed on one side of the treatment chamber (1). Two support wheels (9) are rotatably connected to one side of the treatment chamber (1). A telescopic rod (11) is installed on the other side of the treatment chamber (1). A support frame (12) is installed at the telescopic end of the telescopic rod (11). Two tension wheels (8) are rotatably connected to the support frame (12). The output end of the reduction motor (6) is installed with a driving wheel (7). The driving wheel (7), the tension wheels (8), and the support wheels (9) are sleeved with the same transmission belt (10). The transmission belt (10) passes through the treatment chamber (1) and is in an S-shaped semi-surrounding of three adjacent sides of the filter plate (2). The transmission belt (10) is supported by the support wheels (9) to prevent the transmission belt (10) from overlapping at the position close to the driving wheel (7). The cleaning components (3) are installed on the transmission belt (10); The cleaning component (3) includes a connection box (14) installed on the transmission belt (10); A second through hole (41) adapted to the transmission belt (10) is opened on the connection box (14). The second through hole (41) penetrates the connection box (14). An installation groove (36) is opened on one side of the connection box (14). A cover plate (31) is installed in the installation groove (36). A first cavity (17) communicating with the second through hole (41) is opened at the adjacent position of the connection box (14) and the cover plate (31). A first placement groove (18) is opened at the bottom of the first cavity (17). An adjusting mechanism (5) for adjusting the relative position between the connection box (14) and the transmission belt (10) is installed on the connection box (14); The adjusting mechanism (5) includes a first spring (19) sleeved in the first placement groove (18). A first sliding rod (20) is slidably connected in the first placement groove (18). The bottom of the first sliding rod (20) abuts against the top of the first spring (19). A limiting plate (21) is installed at the top of the first sliding rod (20). The top of the limiting plate (21) is adapted to the bottom of the transmission belt (10). The top of the limiting plate (21) is provided with a rough surface. A first through hole (27) is formed on one side of the first sliding rod (20). A first inclined surface (28) is formed at the bottom of the first through hole (27). A second sliding rod (29) which penetrates through and extends into the first placement groove (18) is slidably connected to the cover plate (31). A second inclined surface (30) adapted to the first inclined surface (28) is formed on one side of the second sliding rod (29) close to the first sliding rod (20). The width of the second sliding rod (29) is smaller than the width of the first through hole (27). One end of the second sliding rod (29) far from the first sliding rod (20) is located outside the cover plate (31) and abuts against the side wall of the treatment chamber (1) driven by the transmission belt (10).

2. The flue gas water curtain type dust removal, desulfurization and denitration device for coal-fired boilers according to claim 1, wherein Folding sleeves (13) sleeved outside the transmission belt (10) are installed on both sides of the cleaning component (3). One side of the folding sleeve (13) far from the cleaning component (3) is connected to the inner wall of the treatment chamber (1).

3. The flue gas water curtain type dust removal, desulfurization and denitrification device for coal-fired boilers according to claim 1, characterized in that, A first cleaning box (15) and a second cleaning box (16) are respectively slidably connected to opposite sides of the connection box (14). Brush hairs are installed on one side of the first cleaning box (15) and the second cleaning box (16) away from each other. A plurality of second placement grooves (34) are formed on one side of the first cleaning box (15) close to the connection box (14) and on one side of the second cleaning box (16) close to the connection box (14). A second spring (35) is sleeved in the second placement groove (34). One end of the second spring (35) far from the first cleaning box (15) or the second cleaning box (16) abuts against the connection box (14).

4. The flue gas water curtain type dust removal, desulfurization and denitrification device for coal-fired boilers according to claim 3, characterized in that A first groove (37) is formed on one side of the connection box (14) close to the first cleaning box (15). The first cleaning box (15) is slidably sleeved with the first groove (37). A second groove (38) is formed on one side of the second cleaning box (16) close to the connection box (14). The connection box (14) is slidably sleeved with the second groove (38). The second placement groove (34) on the second cleaning box (16) is formed in the second groove (38).

5. The flue gas water curtain type dust removal, desulfurization and denitration device for coal-fired boilers according to claim 3, characterized in that, Both sides of the first cavity (17) penetrate through the connection box (14). On one side of the first cleaning box (15) close to the connection box (14), a first moving slot (22) is formed. On one side of the second cleaning box (16) close to the connection box (14), an extension plate (24) is provided. On one side of the second cleaning box (16) close to the connection box (14), a second moving slot (23) is formed. At the bottom of the transmission belt (10), at the top of the first moving slot (22), at the top of the second moving slot (23), and at the bottom of the extension plate (24), a plurality of limiting slots (25) are evenly formed. A plurality of limiting posts (26) adapted to the limiting slots (25) are installed on the limiting plate (21). Both sides of the limiting plate (21) penetrate through the first cavity (17) and extend into the first moving slot (22) and the second moving slot (23) respectively.

6. The flue gas water curtain type dust removal, desulfurization and denitrification device for coal-fired boilers according to claim 5, characterized in that, The top of the limiting post (26) is tapered. Chamfers are formed at the bottoms of the limiting slots (25). The chamfered edges of adjacent limiting slots (25) are adjacent to each other.

7. The flue gas water curtain type dust removal, desulfurization and denitrification device for a coal-fired boiler according to claim 1, characterized in that, A stepped slot (33) penetrating through the cover plate (31) is formed on the cover plate (31). The second sliding rod (29) is slidably sleeved with the small hole of the stepped slot (33). A limiting ring (32) is installed on the second sliding rod (29). The large hole of the stepped slot (33) faces the first sliding rod (20). The limiting ring (32) is slidably sleeved with the large hole of the stepped slot (33).

8. The flue gas water curtain type dust removal, desulfurization and denitrification device for coal-fired boilers according to claim 1, characterized in that, A dust collection hopper (39) is installed at the bottom of the treatment chamber (1). A plurality of dust outlet slots (40) communicating with the dust collection hopper (39) are formed at the bottom of the treatment chamber (1). The dust falling from the filter plate (2) enters the dust collection hopper (39) through the dust outlet slots (40). Three partition plates are installed at the bottom of the dust collection hopper (39). The partition plates divide the interior of the dust collection hopper (39) into a plurality of non - communicating empty bins. The top of the partition plates abuts against the bottom of the filter plate (2).

9. Method for using the flue gas water curtain type dust removal, desulfurization and denitrification device for coal-fired boilers, applying the flue gas water curtain type dust removal, desulfurization and denitrification device for coal-fired boilers described in any one of claims 1-8, characterized in that, Including the following steps: S1: After the flue gas enters through the air inlet, it is preliminarily dust - removed through the filtration component, then adsorbed and dust - removed through the water curtain main body, and then the sulfur dioxide and nitrogen oxides in the flue gas are converted into ammonium sulfate and ammonium nitrate through the electron beam radiation main body. A mesh cloth soaked with wet alkaline liquid is installed on the surface of the absorption filter. Desulfurization and denitrification are carried out when the flue gas with ammonium sulfate, ammonium nitrate, sulfuric acid and nitric acid passes through the absorption filter. The treated flue gas is discharged through the air outlet. S2: When it is necessary to clean the filter plate (2), the reduction motor (6) drives the driving wheel (7) to rotate reciprocally. The driving wheel (7) drives the transmission belt (10) to make a reciprocating rotary motion under the action of the tensioning wheel (8) and the supporting wheel (9). During this process, the cleaning component (3) horizontally sweeps the filtering side of the filter plate (2), and the transmission belt (10) continuously extends and folds. When cleaning the filter plate (2), the dust falling from the filter plate (2) enters the dust collection hopper (39) through the dust outlet slots (40).

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