A dust removal device for flue gas desulfurization and denitrification

Abstract

This utility model relates to the field of flue gas dust removal technology, specifically to a dust removal device for flue gas desulfurization and denitrification, comprising an inlet pipe, an adsorption component, a replacement component, a pulse component, a collection chamber, an outlet pipe, and an exhaust component. The adsorption component is installed on one side of the inlet pipe and is used to adsorb dust from the flue gas after desulfurization and denitrification. The replacement component is installed inside the adsorption component and is used for quick installation and removal of the dust collector bags. The pulse component is installed above the adsorption component and is used to instantly expand the dust collector bags via a pulse valve, thereby causing the dust adsorbed inside the dust collector bags to fall off. The collection chamber is installed at the bottom of the adsorption component and is used to collect dust. The outlet pipe is installed above the pulse component, and an exhaust component is installed on one side of the outlet pipe, which is used to discharge the flue gas.

Description

Technical Field

[0001] This utility model relates to the field of flue gas dust removal technology, specifically to a dust removal device for flue gas desulfurization and denitrification. Background Technology

[0002] Dust removal devices in flue gas desulfurization and denitrification systems typically employ high-efficiency bag filters or electrostatic precipitators / bag filters, installed before and after the desulfurization and denitrification processes. These devices reduce the dust concentration in the flue gas to ≤10 mg / m³, protecting the subsequent activated carbon or catalyst from dust blockage. At the end of the process, they further capture desulfurization and denitrification byproducts and activated carbon powder, ensuring that flue gas particulate matter consistently meets ultra-low emission standards. However, replacing filter bags in existing bag filters requires shutdown, cooling, and manual entry into a narrow, dimly lit chamber. The workers must bend over and crouch within this limited space to remove bag cages, remove old bags, and install new ones row by row. The entire process relies on manual labor, is cumbersome, and time-consuming. Furthermore, the system faces multiple dangers from high altitudes, high temperatures, high dust levels, and toxic gases. The bag seals rely entirely on touch, resulting in inconsistent tightness and potential leaks.

[0003] Therefore, the present invention provides a dust removal device for flue gas desulfurization and denitrification to solve the above problems. Utility Model Content

[0004] The technical problem this utility model aims to solve is that when replacing filter bags in existing baghouse dust collectors, the machine must be stopped, cooled, and workers must crawl into the narrow and dark chamber, bending and squatting in the limited space to remove the bag cages, remove the old bags, and install the new bags row by row. The entire process relies on manual labor, which is cumbersome and time-consuming. At the same time, it faces multiple dangers such as high altitude, high temperature, high dust, and toxic gases. The bag opening seal is entirely based on feel, which is inconsistent and prone to leakage.

[0005] This utility model provides the following technical solution: a dust removal device for flue gas desulfurization and denitrification, comprising an inlet pipe, an adsorption component, a replacement component, a pulse component, a collection chamber, an outlet pipe, and an exhaust component. The adsorption component is installed on one side of the inlet pipe and is used to adsorb dust from the flue gas after desulfurization and denitrification. The replacement component is installed inside the adsorption component and is used for quick installation and removal of the dust collector bag. The pulse component is installed above the adsorption component and is used to instantly expand the dust collector bag through a pulse valve, thereby causing the dust adsorbed inside the dust collector bag to fall off. The collection chamber is installed at the bottom of the adsorption component and is used to collect dust. The outlet pipe is installed above the pulse component, and an exhaust component is installed on one side of the outlet pipe, used to discharge the flue gas.

[0006] Preferably, the adsorption assembly includes a support frame, an adsorption chamber, a fixing plate, and dust collection bags. The support frame is installed on the ground, the adsorption chamber is installed on the support frame, the fixing plate is installed on the top of the adsorption chamber, and dust collection bags are arranged in an array on the fixing plate.

[0007] Preferably, the replacement component includes a moving track, an electric slider, a moving plate, a placement hole, an annular fixing plate, and a limiting groove. The moving track is symmetrically opened on the inner wall of the adsorption chamber. An electric slider is installed in the moving track. A moving plate is installed on the electric slider. A placement hole for placing a dust collector bag is installed on the moving plate. An annular fixing plate is installed on the dust collector bag. A limiting groove for limiting the fixing plate is installed in the placement hole.

[0008] Preferably, the fixing plate has mounting holes corresponding to the placement holes, and the dust collector bag is fixed by pressing the annular fixing piece through the mounting holes and the placement holes.

[0009] Preferably, the pulse assembly includes a pulse support, an air tank, a pulse valve, and an air delivery pipe. The pulse support is installed on one side of the adsorption chamber, the air tank is installed on the pulse support, the pulse valve is arranged in an array above the air tank, the output end of the pulse valve is installed with an air delivery pipe, the air delivery pipe extends into the adsorption chamber and has air holes in it that correspond to the dust collector bag.

[0010] Preferably, the exhaust assembly includes a soft cloth connector, a centrifugal fan, and an exhaust pipe. The soft cloth connector is installed at one end of the exhaust pipe, and the centrifugal fan is installed at the other end of the soft cloth connector. An exhaust pipe is installed at the output end of the centrifugal fan.

[0011] The beneficial effects of this utility model are as follows: 1. This utility model achieves pre-installation of all baghouse compartments and boltless one-time locking by pressing the "lifting moving plate + annular fixing plate" with the mounting holes of the fixing plate from top to bottom, saving manual disassembly and assembly row by row and shortening downtime; the side-mounted pulse component sprays air through the array of air holes, resulting in a short dust removal path and low pressure loss, ensuring continuous low-resistance operation; the soft cloth pipe absorbs fan vibration and thermal displacement, preventing air leakage and weld fatigue, while also providing top space and not interfering with the lifting mechanism; the collection compartment integrates to receive falling dust, resulting in high system integration and improving the replacement efficiency, sealing reliability and long-term stable operation capability of the dust removal device after flue gas desulfurization and denitrification. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a schematic diagram of the pulse component of this utility model; Figure 3 This is a schematic diagram showing the positions of the electric slider and the moving plate of this utility model; Figure 4 This is a schematic diagram of the interior of the adsorption chamber of this utility model; Figure 5 This is a schematic diagram of the replacement components of this utility model; Figure 6 This is a cross-sectional schematic diagram of the replacement component of this utility model.

[0014] In the diagram: 1. Inlet pipe; 2. Adsorption assembly; 21. Support frame; 22. Adsorption chamber; 23. Fixing plate; 231. Mounting hole; 24. Dust collector bag; 3. Replacement assembly; 31. Moving track; 32. Electric slider; 33. Moving plate; 34. Placement hole; 35. Annular fixing piece; 36. Limiting groove; 4. Pulse assembly; 41. Pulse bracket; 42. Air tank; 43. Pulse valve; 44. Air supply pipe; 5. Collection chamber; 6. Air outlet pipe; 7. Exhaust assembly; 71. Soft cloth connecting pipe; 72. Centrifugal fan; 73. Exhaust pipe. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, 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, not all, of the embodiments of this utility model. Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely represents some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0016] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0017] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and "back side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this utility model is conventionally placed during use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0018] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] The present invention aims to solve the problems of existing baghouse dust collectors, which require the machine to be stopped, cooled, and workers to crawl into a narrow and dark chamber to replace filter bags. In this limited space, workers have to bend over and squat to remove the bag cages, remove the old bags, and install the new bags one by one. The entire process relies on manual labor, which is cumbersome and time-consuming. At the same time, the dust collectors face multiple dangers such as high altitude, high temperature, high dust, and toxic gases. The bag opening seal is entirely based on feel, which is inconsistent and prone to leakage. In view of this, the present disclosure proposes a dust removal device for flue gas desulfurization and denitrification. Through the vertical compression of the "lifting moving plate + annular fixing plate" with the mounting holes of the fixing plate, all baghouse compartments are pre-installed externally and locked in one boltless operation, eliminating the need for manual disassembly and assembly row by row and shortening downtime. The side-mounted pulse assembly uses arrayed air holes for aligned blowing, resulting in a short cleaning path and low pressure loss, ensuring continuous low-resistance operation. The soft cloth connecting pipe absorbs fan vibration and thermal displacement, preventing air leakage and weld fatigue, while also providing top space and preventing interference with the lifting mechanism. The integrated collection compartment receives the falling dust, resulting in high system integration and overall improvement in the replacement efficiency, sealing reliability, and long-term stable operation capability of the dust removal device after flue gas desulfurization and denitrification.

[0020] like Figures 1 to 5As shown, a dust removal device for flue gas desulfurization and denitrification includes an inlet pipe 1, an adsorption assembly 2, a replacement assembly 3, a pulse assembly 4, a collection chamber 5, an outlet pipe 6, and an exhaust assembly 7. The adsorption assembly 2 is installed on one side of the inlet pipe 1, and is used to adsorb dust from the flue gas after desulfurization and denitrification. The replacement assembly 3 is installed inside the adsorption assembly 2, and is used for quick installation and removal of the dust collector bags 24. The pulse assembly 4 is installed above the adsorption assembly 2, and is used to cause the dust collector bags 24 to expand instantaneously through a pulse valve 43, thereby causing the dust adsorbed inside the dust collector bags 24 to fall off. The collection chamber 5 is installed at the bottom of the adsorption assembly 2, and is used to collect dust. The outlet pipe 6 is installed above the pulse assembly 4, and the exhaust assembly 7 is installed on one side of the outlet pipe 6, and is used to discharge the flue gas. By pressing the "lifting moving plate 33 + annular fixing plate 35" against the mounting holes 231 of the fixing plate 23, all baghouses are pre-installed externally and locked in one boltless operation, eliminating the need for manual disassembly and assembly row by row and shortening downtime. The side-mounted pulse assembly 4 is aligned and blown through the array of air holes, resulting in a short dust removal path and low pressure loss, ensuring continuous low-resistance operation. The soft cloth pipe 71 absorbs fan vibration and thermal displacement, preventing air leakage and weld fatigue, while also providing top space and not interfering with the lifting mechanism. The collection bin 5 integrates and receives the falling dust, resulting in high system integration and improving the replacement efficiency, sealing reliability, and long-term stable operation capability of the dust removal device after flue gas desulfurization and denitrification.

[0021] like Figures 1 to 6 As shown, the adsorption assembly 2 includes a support frame 21, an adsorption chamber 22, a fixing plate 23, and dust collector bags 24. The support frame 21 is installed on the ground and is used to support the adsorption assembly 2. The adsorption chamber 22 is installed on the support frame 21 and is used to adsorb dust in the flue gas. The fixing plate 23 is installed on the top of the adsorption chamber 22 and is used to fix the dust collector bags 24 in conjunction with the replacement assembly 3. At the same time, a filter cage is installed on the fixing plate 23 to ensure the shape of the dust collector bags 24. The dust collector bags 24 are arranged in an array on the fixing plate 23. The dust collector bags 24 are used to filter out dust in the flue gas. During operation, the replacement component 3 moves the dust collector bag 24 upward to the position of the fixing plate 23 and squeezes it to fix the dust collector bag 24. At this time, the air inlet pipe 1 delivers flue gas into the adsorption chamber 22. After being filtered by the dust collector bag 24, the flue gas is discharged from the air outlet pipe 6 at the top of the adsorption chamber 22. The above design places the fixed plate 23 and the liftable replacement component 3 vertically opposite each other. The replacement component 3 lifts the dust collector bag 24 upwards as a whole, and the bag mouth is squeezed against the fixed plate 23 to complete the pressing and fixing of all the bags at once. There is no need for operators to enter the narrow box to disassemble and install row by row. It realizes "bag loading outside the box, overall positioning, and one-click locking", which significantly simplifies the replacement process and shortens the downtime. The fixed plate 23 also supports the filter cage to ensure the filter shape of the bag and takes into account both support and sealing.

[0022] like Figures 1 to 6 As shown, the replacement component 3 includes a moving track 31, an electric slider 32, a moving plate 33, a placement hole 34, an annular fixing piece 35, and a limiting groove 36. The moving track 31 is symmetrically arranged on the inner wall of the adsorption chamber 22, and is used to allow the electric slider 32 to slide inside it. The electric slider 32 is installed inside the moving track 31, and is used to slide within the moving track 31, thereby driving the moving plate 33 to slide. The moving plate 33 is installed on the electric slider 32, and is used to drive the dust collector bag 24 to move upward until it is fully unfolded. The moving plate 33 is installed with a placement hole 34 for placing the dust collector bag 24. The dust collector bag 24 is installed with an annular fixing piece 35, which is used to fix the dust collector bag 24 in the placement hole 34. The placement hole 34 is equipped with a limiting groove 36 for limiting the annular fixing piece 35. During operation, the operator fixes the dust collector bag 24 onto the annular fixing plate 35, passes the dust collector bag 24 through the placement hole 34, and places the annular fixing plate 35 into the limiting groove 36. At this time, under the limitation of the limiting groove 36, the annular fixing plate 35 is fixed above the moving plate 33. Then, the electric slider 32 is activated, which drives the moving plate 33 to move upward, causing the dust collector bag 24 to pass through the filter cage until the annular fixing plate 35 contacts the fixing plate 23 and stops. At this time, the dust collector bag 24 is fixed on the fixing plate 23, and the dust removal work is completed. The above design uses an external lifting scheme of "moving track 31 + electric slider 32 + moving plate 33" to allow operators to load all the bags along with the annular fixing plate 35 into the limiting groove 36 at once without entering the box. Then, the electric slider 32 lifts the moving plate 33 upward as a whole, and the bag opening automatically passes through the filter cage and is pressed tightly with the fixing plate 23 to complete the positioning and sealing. This achieves "external pre-loading, overall lifting, and one-time locking", which significantly simplifies the disassembly and assembly process, shortens downtime, and avoids manual row-by-row operation in high-altitude, high-dust, and highly toxic environments, thereby improving replacement efficiency and operational safety.

[0023] like Figure 6As shown, the fixing plate 23 has mounting holes 231 corresponding to the placement holes 34. The mounting holes 231 and the placement holes 34 are used to press the annular fixing piece 35 to fix the dust collector bag 24. The above design utilizes the mounting holes 231 of the fixing plate 23 and the placement holes 34 of the moving plate 33 to be aligned vertically. At the end point of the upward movement of the electric slider 32, a mechanical pressing surface is formed on the annular fixing piece 35. The radial sealing and axial locking of all bags can be completed in one go without bolts, clamps or manual tightening. This ensures that the bag opening is evenly stressed and the sealing is reliable. It also eliminates the need for row-by-row tightening, greatly shortens the installation time, reduces the risk of leakage, and achieves quick disassembly and assembly with "no tools and zero bolts".

[0024] like Figure 2 As shown, the pulse assembly 4 includes a pulse support 41, an air tank 42, a pulse valve 43, and an air delivery pipe 44. The pulse support 41 is installed on one side of the adsorption chamber 22. The air tank 42 is installed on the pulse support 41. The pulse valve 43 is arranged in an array above the air tank 42. The air delivery pipe 44 is installed at the output end of the pulse valve 43. The air delivery pipe 44 extends into the adsorption chamber 22 and has air holes that correspond to the dust collector bag 24. The pulse assembly 4 integrates the air tank 42, pulse valve 43, and air supply pipe 44 with arrayed air holes on the side of the adsorption chamber 22, so that compressed air can reach the opening of each filter bag directly through the air supply pipe 44 for instantaneous directional blowing. The dust removal path is short and the pressure loss is small, which can accurately peel off the dust from the filter bags row by row and avoid secondary adsorption. The side-mounted arrangement does not occupy the top maintenance space and does not interfere with the lifting replacement assembly 3, realizing "replacing bags while maintaining", extending the life of the filter bags and ensuring long-term low-resistance operation of the desulfurization and denitrification system.

[0025] like Figure 1 As shown, the exhaust assembly 7 includes a soft cloth pipe 71, a centrifugal fan 72 and an exhaust pipe 73. The soft cloth pipe 71 is installed at one end of the exhaust pipe 6, and the centrifugal fan 72 is installed at the other end of the soft cloth pipe 71. The exhaust pipe 73 is installed at the output end of the centrifugal fan 72. The exhaust assembly 7 adds a soft cloth pipe 71 between the exhaust pipe 6 and the centrifugal fan 72. It uses its flexible and extensible characteristics to absorb the fan vibration and thermal displacement, avoiding fatigue cracking of the weld and air leakage caused by rigid connection. At the same time, the soft cloth section can be quickly installed and removed without hindering the lifting of the moving plate 33, realizing the three-in-one effect of "vibration reduction-sealing-giveaway", improving system reliability and reducing maintenance difficulty.

[0026] The overall working process is as follows: First, the staff presses the annular fixing plate 35 at the opening of the dust collector bag 24 into the limiting groove 36 of the moving plate 33 through the inspection door, completing the pre-installation of the entire tray of bags; then, the electric slider 32 is started, and the moving plate 33 rises along the track as a whole, sending the bags into the filter cage and making the annular fixing plate 35 fit with the mounting hole 231 of the fixing plate 23, forming a compression seal, achieving boltless one-time locking; after locking, the dust-laden flue gas enters the adsorption chamber 22 through the inlet pipe 1, is filtered by the dust collector bag 24, and is discharged through the outlet pipe 6. During this period, the centrifugal fan 72 continuously draws through the soft cloth pipe 71 to maintain negative pressure in the chamber; when the dust layer on the surface of the bag thickens, the pulse valve 43 opens in sequence, and the compressed air in the air tank 42 is instantly injected into each bag through the air outlet of the air pipe 44, causing the filter bag to expand rapidly, the dust to fall off and fall into the bottom collection chamber 5; after the dust removal is completed, the system resumes filtration.

[0027] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A dust removal device for flue gas desulfurization and denitrification, characterized in that, The assembly includes an inlet pipe (1), an adsorption component (2), a replacement component (3), a pulse component (4), a collection chamber (5), an outlet pipe (6), and an exhaust component (7). The adsorption component (2) is installed on one side of the inlet pipe (1) and is used to adsorb dust in the flue gas after desulfurization and denitrification. The replacement component (3) is installed inside the adsorption component (2) and is used to quickly install and remove the dust collector bag (24). The pulse component (4) is installed above the adsorption component (2) and is used to make the dust collector bag (24) expand instantly through the pulse valve (43), thereby causing the dust adsorbed in the dust collector bag (24) to fall off. The collection chamber (5) is installed at the bottom of the adsorption component (2) and is used to collect dust. The outlet pipe (6) is installed above the pulse component (4) and is equipped with an exhaust component (7) on one side of the outlet pipe (6) and is used to discharge the flue gas.

2. The dust removal device for flue gas desulfurization and denitrification according to claim 1, characterized in that: The adsorption assembly (2) includes a support frame (21), an adsorption chamber (22), a fixing plate (23), and a dust collection bag (24). The support frame (21) is installed on the ground, the adsorption chamber (22) is installed on the support frame (21), the fixing plate (23) is installed on the top of the adsorption chamber (22), and the dust collection bags (24) are arranged in an array on the fixing plate (23).

3. A dust removal device for flue gas desulfurization and denitrification according to claim 2, characterized in that: The replacement component (3) includes a moving track (31), an electric slider (32), a moving plate (33), a placement hole (34), an annular fixing piece (35), and a limiting groove (36). The moving track (31) is symmetrically opened on the inner wall of the adsorption chamber (22). An electric slider (32) is installed in the moving track (31). A moving plate (33) is installed on the electric slider (32). A placement hole (34) for placing a dust collector bag (24) is installed on the moving plate (33). An annular fixing piece (35) is installed on the dust collector bag (24). A limiting groove (36) for limiting the annular fixing piece (35) is installed in the placement hole (34).

4. A dust removal device for flue gas desulfurization and denitrification according to claim 3, characterized in that: The fixing plate (23) has an installation hole (231) corresponding to the placement hole (34). The dust collector bag (24) is fixed by pressing the annular fixing piece (35) through the installation hole (231) and the placement hole (34).

5. A dust removal device for flue gas desulfurization and denitrification according to claim 4, characterized in that: The pulse assembly (4) includes a pulse support (41), an air tank (42), a pulse valve (43), and an air delivery pipe (44). The pulse support (41) is installed on one side of the adsorption chamber (22). An air tank (42) is installed on the pulse support (41). A pulse valve (43) is arranged in an array above the air tank (42). An air delivery pipe (44) is installed at the output end of the pulse valve (43). The air delivery pipe (44) extends into the adsorption chamber (22) and has air holes that correspond to the dust collector bag (24).

6. A dust removal device for flue gas desulfurization and denitrification according to claim 5, characterized in that: The exhaust assembly (7) includes a soft cloth pipe (71), a centrifugal fan (72) and an exhaust pipe (73). The soft cloth pipe (71) is installed at one end of the exhaust pipe (6), and the centrifugal fan (72) is installed at the other end of the soft cloth pipe (71). The exhaust pipe (73) is installed at the output end of the centrifugal fan (72).

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