Flue gas dust remover

Abstract

The invention provides a flue gas dust remover, which belongs to the technical field of flue gas dust removal equipment and comprises a box body, a dust filtering assembly and a flow guide assembly. An air inlet pipe is arranged at the lower part of the box body; the dust filtering assembly is arranged in the box body, is located between the exhaust pipe and the gas inlet pipe and is used for filtering dust in the flue gas to obtain clean gas; clean gas is suitable for being discharged through the exhaust pipe; the flow guide assembly is arranged in the box body and located between the air inlet pipe and the dust filtering assembly. The flow guide assembly is connected with the gas inlet pipe and used for changing the flowing direction of the flue gas so that the flue gas can be discharged into the box body in the horizontal direction. According to the flue gas dust remover provided by the invention, the distribution uniformity of flue gas in the box body can be remarkably improved through the flow guide assembly, and the situation that the load of the dust filtering assembly is too large due to too high local airflow speed is avoided, so that the filtering efficiency is improved, and the service life of a filtering material is prolonged. Meanwhile, the direct impact of flue gas on the dust filtering assembly is reduced through the horizontal flowing design, and the operation noise and energy consumption of the system are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of flue gas dust removal equipment, and more specifically, relates to a flue gas dust collector. Background Art

[0002] Flue gas dust collectors are widely used to purify flue gas from industrial kilns such as rotary kilns, shaft kilns, and steel kilns. These kilns generate large amounts of dust-laden flue gas during production processes (e.g., cement calcination, metal smelting, and ore roasting). This dust primarily consists of raw material particles, fuel residue, and high-temperature reaction products. Direct discharge of this dust not only causes air pollution but also potentially impacts the surrounding environment and human health.

[0003] Currently, existing flue gas dust collectors typically consist of a flue gas pipeline, a dust collection box, and a filtration system. The flue gas pipeline directs the kiln's flue gas into the dust collection box, which is equipped with filter elements such as filter bags, filter cartridges, metal fiber felt, or ceramic filter tubes. As the flue gas passes through the filter element, dust is trapped on or within the filter media, and the purified gas is discharged through the air outlet.

[0004] The inventors discovered that when flue gas is piped directly into the dust removal box, it impacts the filter surface at a high velocity. Because kiln flue gas is hot and often contains incompletely burned, high-temperature carbon particles, the high-temperature airflow and carbon particles continuously impact the filter, causing thermal deformation, ablation, or chemical aging of the filter material. This problem directly shortens the filter's service life, requiring frequent downtime for replacement. This not only increases filter material procurement costs, but also reduces production continuity, indirectly increasing the overall cost of the equipment. Summary of the Invention

[0005] The purpose of this application is to provide a flue gas dust collector to solve the technical problem that during the use of the existing flue gas dust collector, high-temperature flue gas and high-temperature carbon particles easily cause damage to the filter elements inside the dust collector, thereby shortening the service life of the filter elements.

[0006] To achieve the above objectives, the technical solution adopted in this application is: A flue gas dust collector is provided, comprising: The box body is provided with an exhaust pipe at the upper part and an air inlet pipe at the lower part; the air inlet pipe is used to receive the smoke generated by the kiln and transport the smoke to the interior of the box body; a dust filter assembly, disposed inside the housing and between the exhaust pipe and the air inlet pipe, for filtering dust in the flue gas to obtain clean gas; the clean gas is suitable for being discharged through the exhaust pipe; and The guide assembly is arranged inside the box and is located between the air inlet pipe and the dust filter assembly; the guide assembly is connected to the air inlet pipe and is used to change the flow direction of the smoke so that the smoke is discharged into the box in a horizontal direction.

[0007] In a possible implementation, the flow guide component includes: An air distribution plate is provided inside the box body and is located between the air inlet pipe and the dust filter assembly; the air distribution plate is communicated with the air inlet pipe to receive the flue gas; and Multiple air distribution pipes are arranged at intervals along the circumference of the air distribution plate and are all connected to the air distribution plate; the upper end of each air distribution pipe is provided with multiple exhaust ports at intervals along the circumference, and the exhaust direction of each exhaust port is arranged in the horizontal direction so that the smoke is discharged in the horizontal direction.

[0008] In a possible implementation, the diameter of the outer wall of the gas distribution plate gradually increases from top to bottom, and the plurality of gas distribution pipes are circumferentially spaced apart along the outer wall of the gas distribution plate.

[0009] In a possible implementation, each of the gas distribution pipes has a baffle at its upper end; and the baffle has a structure with gradually increasing diameter from top to bottom.

[0010] In a possible implementation, the large-diameter end of the baffle is located at a lower side of the plurality of exhaust ports, so that the smoke exhausted from the exhaust ports flows toward the inner wall of the baffle.

[0011] In a possible implementation, the flue gas dust collector further includes: A cooling component is arranged inside the box body and is connected to the gas distribution plate and the plurality of gas distribution pipes, and is used to reduce the temperature of the flue gas flowing through the gas distribution plate and the gas distribution pipes.

[0012] In one possible implementation, the cooling component includes: an annular pipe, sleeved on the gas distribution plate, the annular pipe being connected to a connecting pipe, the connecting pipe being used to circulate a cooling medium into the annular pipe through a cooling circulation device; and A plurality of cooling jackets correspond one to one with the plurality of air distribution pipes, and each of the cooling jackets is sleeved on the corresponding air distribution pipe; and each of the cooling jackets is communicated with the annular pipe.

[0013] In a possible implementation, the flue gas dust collector further includes: A draught fan, the air inlet end of the draught fan is connected to the box body, and the exhaust end of the draught fan is connected to the exhaust pipe; the draught fan is used to extract the gas inside the box body to put the inside of the box body in a negative pressure state.

[0014] In one possible implementation, the dust filter assembly includes: A partition is horizontally arranged inside the box body and is located between the exhaust pipe and the guide assembly; the partition has a plurality of mounting holes arranged in parallel along the horizontal direction, and the axial direction of each mounting hole is parallel to the up-down direction; A plurality of filter bags, corresponding to the plurality of mounting holes one by one, each of the filter bags being inserted into the corresponding mounting hole; the filter bags and the corresponding mounting holes being sealed to filter dust in the flue gas to obtain clean gas; each of the filter bags having a supporting frame inside; and The cleaning mechanism is arranged on the upper side of the partition and is used for intermittently cleaning the dust attached to the plurality of filter bags.

[0015] In one possible implementation, the cleaning mechanism includes: A plurality of nozzles corresponding to the plurality of filter bags, wherein the axial direction of each nozzle is parallel to the up-down direction; the outlet end of each nozzle is coaxially located above the corresponding filter bag; and An air storage tank is used to store compressed gas, and the air storage tank is connected to the multiple nozzles; a pulse valve is provided at the exhaust end of the air storage tank, so that the air storage tank can intermittently deliver compressed gas to the multiple nozzles to clean the dust attached to the filter bag.

[0016] In the present embodiment, the flue gas generated by the kiln first enters the dust collector through the air intake duct at the bottom of the housing, then flows through the flow guide assembly located between the air intake duct and the dust filter assembly. The flow guide assembly's structural design adjusts the flow direction of the vertically entering flue gas to a horizontal direction, allowing the flue gas to be discharged evenly horizontally into the housing. As the horizontally flowing flue gas passes upward through the dust filter assembly, the dust within it is filtered and trapped, and the purified gas is ultimately discharged through the exhaust duct at the top of the housing.

[0017] Compared to existing technologies, the flue gas dust collector provided in the present application significantly improves the uniformity of flue gas distribution within the chamber by redirecting the flue gas flow from vertical to horizontal through a flow guide assembly. This prevents uneven loading of the dust filter assembly due to excessive local airflow velocities, thereby increasing filtration efficiency and filter material life. Furthermore, the horizontal flow design reduces the direct impact of flue gas on the dust filter assembly, lowering system operating noise and energy consumption. The overall structure is compact and the process is streamlined, contributing to improved dust collector stability and ease of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a flue gas dust collector provided in an embodiment of the present invention; Figure 2 A schematic diagram of the side structure of the flue gas dust collector provided by an embodiment of the present invention Figure 1 ; Figure 3 A schematic diagram of the side structure of the flue gas dust collector provided by an embodiment of the present invention Figure 2 ; Figure 4 For the Figure 3 Schematic diagram of the cross-section structure along the AA line; Figure 5 A schematic diagram of a three-dimensional cross-sectional structure of a flue gas dust collector provided by an embodiment of the present invention; Figure 6 for Figure 5 Schematic diagram of the enlarged structure of the middle I region; Figure 7 for Figure 5 Schematic diagram of the enlarged structure of the middle II region; Among them, the reference numerals in the figures are: 1. Box body; 11. Exhaust pipe; 12. Inlet pipe; 2. Dust filter assembly; 21. Partition; 22. Filter bag; 221. Support frame; 23. Cleaning mechanism; 231. Nozzle; 232. Air storage tank; 3. Guide assembly; 31. Air distribution plate; 32. Air distribution pipe; 321. Exhaust port; 322. Baffle; 4. Cooling assembly; 41. Annular pipe; 42. Cooling jacket; 43. Connecting pipe; 5. Drainage fan. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0024] Please also refer to Figures 1 to 7 The flue gas dust collector provided by the present application is now described. The flue gas dust collector comprises a housing 1, a dust filter assembly 2 and a flow guide assembly 3.

[0025] An exhaust pipe 11 is provided at the upper portion of the box body 1 , and an air intake pipe 12 is provided at the lower portion thereof; the air intake pipe 12 is used to receive the flue gas generated from the kiln and transport the flue gas to the interior of the box body 1 .

[0026] The dust filter assembly 2 is arranged inside the box body 1 and is located between the exhaust pipe 11 and the air inlet pipe 12, and is used to filter dust in the flue gas to obtain clean gas; the clean gas is suitable for being discharged through the exhaust pipe 11.

[0027] The guide component 3 is arranged inside the box body 1 and is located between the air inlet pipe 12 and the dust filter component 2; the guide component 3 is connected to the air inlet pipe 12 and is used to change the flow direction of the smoke so that the smoke is discharged into the box body 1 in a horizontal direction.

[0028] Kiln flue gas enters chamber 1 through intake pipe 12, is redirected horizontally by flow guide assembly 3, and then flows upward through dust filter assembly 2, where dust is filtered. The clean gas is ultimately discharged through exhaust pipe 11. The flow guide assembly 3 redirects the vertically entering flue gas into a horizontal flow, preventing the high-speed flue gas from directly impacting dust filter assembly 2. Dust filter assembly 2 uses filter media (such as filter bags 22) to trap dust, achieving gas-solid separation.

[0029] An airflow distribution plate can be added to the guide component 3 to further optimize the uniformity of the horizontal airflow; the dust filter component 2 can use filter materials of different materials (such as PTFE coated filter bags 22) to adapt to high temperature or corrosive flue gas.

[0030] In this embodiment, the flue gas generated by the kiln first enters the dust collector through the air inlet pipe 12 at the bottom of the housing 1, then flows through the flow guide assembly 3 located between the air inlet pipe 12 and the dust filter assembly 2. The flow guide assembly 3, through its structural design, adjusts the flow direction of the vertically entering flue gas to a horizontal direction, allowing the flue gas to be discharged evenly horizontally into the housing 1. As the horizontally flowing flue gas passes upward through the dust filter assembly 2, the dust within it is filtered and trapped, and the purified clean gas is ultimately discharged through the exhaust pipe 11 at the top of the housing 1.

[0031] Compared to the prior art, the flue gas dust collector provided in the present embodiment significantly improves the uniformity of flue gas distribution within the housing 1 by changing the direction of flue gas flow from vertical to horizontal through the flow guide assembly 3. This prevents uneven loading of the dust filter assembly 2 due to excessive local airflow velocities, thereby improving filtration efficiency and filter material life. Furthermore, the horizontal flow design reduces the direct impact of flue gas on the dust filter assembly 2, reducing system operating noise and energy consumption. The overall structure is compact and the process is simple, which helps improve the stability and maintenance ease of the dust collector.

[0032] In some embodiments, the above-mentioned flow guide component 3 can be used as follows Figure 4 、 Figure 5 and Figure 6 The structure shown, see Figure 4 、 Figure 5 and Figure 6 The flow guide assembly 3 includes an air distribution plate 31 and a plurality of air distribution pipes 32 .

[0033] The gas distribution plate 31 is arranged inside the box body 1 and is located between the air inlet pipe 12 and the dust filter assembly 2; the gas distribution plate 31 is connected to the air inlet pipe 12 to receive the flue gas.

[0034] Multiple gas distribution pipes 32 are arranged at intervals along the circumference of the gas distribution plate 31 and are all connected to the gas distribution plate 31; the upper end of each gas distribution pipe 32 is provided with multiple exhaust ports 321 at intervals along the circumference, and the exhaust direction of each exhaust port 321 is arranged in the horizontal direction so that the smoke is discharged in the horizontal direction.

[0035] After entering the gas distribution plate 31, the flue gas is evenly discharged into the housing 1 through the circumferentially distributed gas distribution pipes 32 and the horizontal exhaust ports 321 at the upper end of each gas distribution pipe 32. The gas distribution plate 31 distributes the flue gas to the multiple gas distribution pipes 32 and evenly diffuses the airflow along the cross-section of the housing 1 through the horizontal exhaust ports 321, preventing uneven loading of the filter bags 22 due to excessive local airflow velocities.

[0036] The air distribution pipe 32 can be detachable to facilitate replacement or angle adjustment; the exhaust port 321 can be equipped with guide vanes to control the direction of airflow to enhance the dust pre-separation effect.

[0037] By adopting the above technical solution, multi-pipe diversion is combined with horizontal exhaust to achieve uniform distribution of flue gas below the dust filter assembly 2, thereby improving the utilization rate of the filter area and reducing the risk of clogging of the filter bag 22.

[0038] In some embodiments, the gas distribution plate 31 can be used as follows Figure 4 and Figure 5 The structure shown, see Figure 4 and Figure 5 From top to bottom, the outer wall diameter of the gas distribution plate 31 gradually increases, and a plurality of gas distribution pipes 32 are arranged at intervals along the circumferential direction of the outer wall of the gas distribution plate 31 .

[0039] Flue gas enters from the underside of the gas distributor 31, flows upward, and is discharged horizontally through the circumferentially spaced gas distributors 32. The conical gas distributor 31 (with a smaller diameter at the top and larger diameter at the bottom) utilizes the principles of fluid mechanics to gradually reduce the velocity of the flue gas as it rises, evenly distributing the pressure across the gas distributors 32. The conical structure reduces eddy currents within the gas distributor 31, lowering flow resistance. The uniform distribution of the gas distributors 32 further enhances airflow uniformity.

[0040] By adopting the above technical solution, the dust in the flue gas falls naturally due to gravity after being separated. When the dust falls on the gas separation plate 31, the dust can move downward along the conical outer wall of the gas separation plate 31, thereby preventing the dust from accumulating on the upper side of the gas separation plate 31.

[0041] In some embodiments, the gas distribution pipe 32 may be Figure 4 、 Figure 5 and Figure 6 The structure shown, see Figure 4 、 Figure 5 and Figure 6 , each gas distribution pipe 32 has a baffle 322 at the upper end; along the direction from top to bottom, the baffle 322 adopts a structure with gradually increasing diameter.

[0042] The horizontal flue gas discharged from the gas distribution pipe 32 first strikes the inner wall of baffle 322, flows upward along the inclined surface, and enters the dust filtration area. The gradually expanding diameter of baffle 322 (smaller at the top and larger at the bottom) guides the horizontal flue gas upward while simultaneously utilizing inertia to separate some large dust particles (dust settles due to gravity). The surface of baffle 322 can be designed with a corrugated structure to enhance turbulence and improve pre-dust removal efficiency. Baffle 322 can be made of wear-resistant ceramic, suitable for high-dust environments.

[0043] By adopting the above technical solution, the baffle 322 can guide the smoke to flow upward to avoid direct impact on the bottom of the filter bag 22; pre-separation of large particles of dust reduces the load of the dust filter component 2 and extends the cleaning cycle.

[0044] In some embodiments, the baffle 322 may be formed as follows: Figure 4 、 Figure 5 and Figure 6 The structure shown, see Figure 4 、 Figure 5 and Figure 6 The large diameter end of the baffle 322 is located at the lower side of the plurality of exhaust ports 321 so that the smoke exhausted from the exhaust ports 321 flows toward the inner wall of the baffle 322 .

[0045] After being discharged horizontally from the exhaust port 321 , the smoke is blocked by the large-diameter end of the baffle 322 , flows upward along the inner wall, bypasses the baffle 322 , and enters the dust filtering area.

[0046] The large diameter end of the baffle 322 is located at the lower side of the exhaust port 321, forming a "downward-supporting" guide structure, forcing the flue gas to change its flow direction and slow down its flow rate, thereby promoting the sedimentation of coarse dust particles.

[0047] By adopting the above technical solution, the airflow deflection effect can be enhanced and the dust directly adhering to the surface of the filter bag 22 can be reduced; after the high-temperature carbon particles in the flue gas are discharged from the exhaust port 321, they will first collide with the inner wall of the baffle 322, causing the high-temperature carbon particles to shrink in volume after the impact, thereby accelerating the cooling of the high-temperature carbon particles and reducing the impact on the filter components; the pre-dust removal function reduces the filtering load of the filter bag 22 and improves the stability of the system operation.

[0048] In some embodiments, the flue gas dust collector may be used as follows Figures 1 to 6 The structure shown, see Figures 1 to 6 The cooling component 4 is arranged inside the box body 1 and is connected to the gas distribution plate 31 and multiple gas distribution pipes 32 to reduce the temperature of the flue gas flowing through the gas distribution plate 31 and the gas distribution pipes 32.

[0049] A cooling medium (such as cooling water or cold air) passes through annular tube 41 and cooling jacket 42, exchanging heat with the flue gas flowing through gas distributor plate 31 and gas distributor pipe 32, thereby reducing the flue gas temperature. The cooling assembly 4 forms a heat exchange system, transferring flue gas heat to the cooling medium through the pipe wall, preventing high-temperature flue gas from damaging dust filter assembly 2.

[0050] A finned cooling jacket 42 may be used to increase the heat dissipation area; the cooling medium may be connected to a temperature control system to achieve precise regulation of the flue gas temperature (eg, to control it below the temperature resistance threshold of the filter bag 22).

[0051] By adopting the above technical solution, high temperature-sensitive components such as the filter bag 22 can be protected, and the applicability of the equipment to high-temperature kiln flue gas can be broadened; the temperature of high-temperature carbon particles in the flue gas can be reduced, and the burning of the filter components can be reduced.

[0052] In some embodiments, the cooling component 4 may be configured as follows: Figures 1 to 6 The structure shown, see Figures 1 to 6 The cooling component 4 includes an annular pipe 41 and multiple cooling jackets 42.

[0053] The annular pipe 41 is sleeved on the gas distribution plate 31 . The annular pipe 41 is connected to a connecting pipe 43 . The connecting pipe 43 is used to circulate a cooling medium into the annular pipe 41 through a cooling circulation device.

[0054] The plurality of cooling jackets 42 correspond to the plurality of air distribution pipes 32 one by one, and each cooling jacket 42 is sleeved on the corresponding air distribution pipe 32 ; each cooling jacket 42 is in communication with the annular pipe 41 .

[0055] The cooling circulation system pumps the cooling medium into the annular tube 41, which distributes it to the cooling jackets 42. The cooling medium then exchanges heat with the flue gas in the gas distribution pipe 32 before returning to the circulation system. The annular tube 41 evenly distributes the cooling medium around the periphery of the gas distribution plate 31. The cooling jackets 42 maintain close contact with the gas distribution pipe 32, reducing the flue gas temperature through conduction and convection.

[0056] The cooling jacket 42 can be wound around the air distribution pipe 32 in a spiral structure to improve the heat exchange efficiency; the annular pipe 41 can be equipped with a flow control valve to adjust the cooling intensity of different areas.

[0057] By adopting the above technical solution, the combined design of the annular tube 41 and the cooling jacket 42 ensures uniform cooling of the gas distribution plate 31 and the gas distribution pipe 32; the independent circulation system is easy to maintain and does not affect the flue gas flow path.

[0058] In some embodiments, the flue gas dust collector may be used as follows Figures 1 to 3 The structure shown, see Figures 1 to 3 , the drainage fan 5, the air inlet end of the drainage fan 5 is connected to the box body 1, and the exhaust end of the drainage fan 5 is connected to the exhaust pipe 11; the drainage fan 5 is used to extract the gas inside the box body 1 to make the inside of the box body 1 in a negative pressure state.

[0059] When the induced draft fan 5 is activated, it draws air from the chamber 1, creating a negative pressure. Due to the pressure differential, the external flue gas enters the chamber 1 through the intake pipe 12, where it is then guided and filtered before being discharged. This negative pressure environment reduces the flue gas's flow resistance, ensuring that the kiln flue gas enters the dust collector in a stable manner. The fan is located at the rear end of the exhaust pipe 11, preventing dust-laden flue gas from flowing directly through the fan and causing wear.

[0060] The drainage fan 5 can adopt a variable frequency fan, which automatically adjusts the speed according to the flue gas flow to save energy; a pressure sensor is added to control the start and stop of the fan in a linked manner to achieve intelligent operation.

[0061] By adopting the above technical solutions, negative pressure operation can avoid smoke leakage and improve system safety; the post-installed fan design extends equipment life and reduces maintenance costs.

[0062] In some embodiments, the dust filter assembly 2 may be configured as follows: Figure 4 、 Figure 5 and Figure 7The structure shown, see Figure 4 、 Figure 5 and Figure 7 The dust filter assembly 2 includes a partition 21, a plurality of filter bags 22 and a cleaning mechanism 23.

[0063] The partition 21 is arranged horizontally inside the box body 1 and is located between the exhaust pipe 11 and the guide assembly 3; the partition 21 has a plurality of mounting holes arranged in parallel along the horizontal direction, and the axial direction of each mounting hole is parallel to the up and down direction.

[0064] Multiple filter bags 22 correspond to multiple mounting holes one by one, and each filter bag 22 is inserted into the corresponding mounting hole; the filter bags 22 and the corresponding mounting holes are sealed to filter dust in the flue gas to obtain clean gas; each filter bag 22 has a supporting frame 221 inside.

[0065] The cleaning mechanism 23 is disposed on the upper side of the partition 21 and is used to intermittently clean dust attached to the plurality of filter bags 22 .

[0066] As flue gas passes through filter bag 22, dust is trapped on its outer surface. Clean gas then passes through bag 22 and enters the upper side of partition 21 through the mounting hole. Cleaning mechanism 23 is used to regularly clean accumulated dust from filter bag 22. The filter bag 22 maintains its shape thanks to support frame 221, filtering dust through mechanisms such as porous material screening and inertial collision. Cleaning mechanism 23 (e.g., pulse jet) vibrates the filter bag 22 through reverse airflow, shaking off accumulated dust.

[0067] The filter bag 22 may be pleated to increase the filtration area; the support frame 221 may be made of corrosion-resistant material (such as stainless steel) to adapt to acidic flue gas.

[0068] By adopting the above technical solution, multiple filter bags 22 are arranged in parallel to increase the processing capacity; the sealed connection design prevents unfiltered flue gas from short-circuiting; the support frame 221 ensures that the filter bag 22 does not collapse under negative pressure, maintaining a stable filtration efficiency.

[0069] In some embodiments, the cleaning mechanism 23 may be configured as follows: Figures 1 to 7 The structure shown, see Figures 1 to 7 The cleaning mechanism 23 includes a plurality of nozzles 231 and an air storage tank 232 .

[0070] The multiple nozzles 231 correspond to the multiple filter bags 22 one by one, and the axial direction of each nozzle 231 is parallel to the up-down direction; the outlet end of each nozzle 231 is coaxially located on the upper side of the corresponding filter bag 22.

[0071] The gas tank 232 is used to store compressed gas, and the gas tank 232 is connected to multiple nozzles 231; a pulse valve is provided at the exhaust end of the gas tank 232 to enable the gas tank 232 to intermittently deliver compressed gas to the multiple nozzles 231 to clean the dust attached to the filter bag 22.

[0072] The compressed gas in the gas storage tank 232 is intermittently released through the pulse valve, and the high-pressure airflow is sprayed into the filter bag 22 through the nozzle 231, causing the filter bag 22 to expand and contract instantly, shaking off the dust on the surface.

[0073] Pulse jetting utilizes short high-pressure airflow to impact the filter bag 22 in the reverse direction, destroying the dust layer structure and achieving rapid dust cleaning; intermittent control avoids frequent dust cleaning affecting the continuity of filtration.

[0074] Zoned injection control (such as cleaning filter bags 22 in groups) can be adopted to reduce system resistance fluctuations; a Venturi tube can be added to the outlet of the nozzle 231 to enhance the airflow injection effect.

[0075] By adopting the above technical solution, pulse cleaning has the advantage of high efficiency and can be performed online (without stopping the machine); intermittent control can reduce compressed air consumption and extend the service life of the filter bag 22.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Flue gas dust collector, characterized in that, include: The box body is provided with an exhaust pipe at the upper part and an air inlet pipe at the lower part; the air inlet pipe is used to receive the smoke generated by the kiln and transport the smoke to the interior of the box body; A dust filter assembly is provided inside the box body and is located between the exhaust pipe and the air inlet pipe, and is used to filter dust in the flue gas to obtain clean gas; the clean gas is suitable for being discharged through the exhaust pipe; as well as The guide assembly is arranged inside the box and is located between the air inlet pipe and the dust filter assembly; the guide assembly is connected to the air inlet pipe and is used to change the flow direction of the smoke so that the smoke is discharged into the box in a horizontal direction.

2. The flue gas dust collector according to claim 1, characterized in that: The flow guide assembly includes: An air distribution plate is provided inside the box body and is located between the air inlet pipe and the dust filter assembly; the air distribution plate is communicated with the air inlet pipe to receive the flue gas; and Multiple air distribution pipes are arranged at intervals along the circumference of the air distribution plate and are all connected to the air distribution plate; the upper end of each air distribution pipe is provided with multiple exhaust ports at intervals along the circumference, and the exhaust direction of each exhaust port is arranged in the horizontal direction so that the smoke is discharged in the horizontal direction.

3. The flue gas dust collector according to claim 2, characterized in that: From top to bottom, the diameter of the outer wall of the gas distribution plate gradually increases, and the plurality of gas distribution pipes are arranged at intervals along the circumferential direction of the outer wall of the gas distribution plate.

4. The flue gas dust collector according to claim 2, characterized in that: The upper end of each gas distribution pipe is provided with a baffle; and the baffle has a structure with gradually increasing diameter from top to bottom.

5. The flue gas dust collector according to claim 4, characterized in that: The large-diameter end of the baffle is located at the lower side of the plurality of exhaust ports, so that the smoke exhausted from the exhaust ports flows toward the inner wall of the baffle.

6. The flue gas dust collector according to claim 2, characterized in that: The flue gas dust collector also includes: A cooling component is arranged inside the box body and is connected to the gas distribution plate and the plurality of gas distribution pipes, and is used to reduce the temperature of the flue gas flowing through the gas distribution plate and the gas distribution pipes.

7. The flue gas dust collector according to claim 6, characterized in that: The cooling component comprises: an annular pipe, sleeved on the gas distribution plate, the annular pipe is connected to a connecting pipe, and the connecting pipe is used to circulate a cooling medium into the annular pipe through a cooling circulation device; and A plurality of cooling jackets correspond one to one with the plurality of air distribution pipes, and each of the cooling jackets is sleeved on the corresponding air distribution pipe; and each of the cooling jackets is communicated with the annular pipe.

8. The flue gas dust collector according to claim 1, characterized in that: The flue gas dust collector also includes: A draught fan, the air inlet end of the draught fan is connected to the box body, and the exhaust end of the draught fan is connected to the exhaust pipe; the draught fan is used to extract the gas inside the box body to put the inside of the box body in a negative pressure state.

9. The flue gas dust collector according to claim 1, characterized in that: The dust filter assembly includes: A partition is horizontally arranged inside the box body and is located between the exhaust pipe and the guide assembly; the partition has a plurality of mounting holes arranged in parallel along the horizontal direction, and the axial direction of each mounting hole is parallel to the up-down direction; A plurality of filter bags, corresponding to the plurality of mounting holes one by one, each of the filter bags being inserted into the corresponding mounting hole; the filter bags and the corresponding mounting holes being sealed to filter dust in the flue gas to obtain clean gas; each of the filter bags having a supporting frame inside; and The cleaning mechanism is arranged on the upper side of the partition and is used for intermittently cleaning the dust attached to the plurality of filter bags.

10. The flue gas dust collector according to claim 9, characterized in that: The cleaning mechanism comprises: A plurality of nozzles corresponding to the plurality of filter bags, wherein the axial direction of each nozzle is parallel to the up-down direction; the outlet end of each nozzle is coaxially located above the corresponding filter bag; and An air storage tank is used to store compressed gas, and the air storage tank is connected to the multiple nozzles; a pulse valve is provided at the exhaust end of the air storage tank, so that the air storage tank can intermittently deliver compressed gas to the multiple nozzles to clean the dust attached to the filter bag.

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