A dust recovery device in roasting furnace flue gas

Abstract

The invention discloses a dust recovery device in the smoke of a roasting furnace, which relates to the technical field of auxiliary equipment of roasting furnaces, comprising: a shell, a smoke inlet pipe, a water inlet pipe and a water outlet pipe are connected and arranged on the side wall of the shell, the water outlet pipe is arranged at a position close to the bottom of the shell, the water inlet pipe is located below the smoke inlet pipe and above the water outlet pipe, and the water inlet pipe and the water outlet pipe are respectively provided with a water inlet valve and a water outlet valve; a filter assembly, the filter assembly comprises a support plate, a first connecting ring, a filter cartridge, a second connecting ring, a limiting ring plate and a driving assembly; the reciprocating swinging assembly of the invention drives a plurality of nozzles to rotate, so that the compressed air sprayed from the plurality of nozzles continuously cleans the filter cartridge, the filter cartridge is driven to rotate 90 degrees by a first motor each time, and then the cleaning position of the filter cartridge is adjusted, so as to improve the effect of the filter cartridge on filtering dust in the smoke, and the serpentine heat exchange tube can recover the waste heat in the smoke to prevent the waste of heat energy.

Description

Technical Field

[0001] The invention relates to the technical field of roasting furnace auxiliary equipment, in particular to a dust recovery device in roasting furnace smoke. Background Art

[0002] Aluminum hydroxide roasting furnace is an important equipment for producing alumina. The working principle of aluminum hydroxide roasting furnace is to calcine aluminum hydroxide powder at high temperature. During the calcination process, aluminum hydroxide powder gradually loses crystal water, the crystal structure changes, and aluminum oxide products are generated. This process is usually carried out in a high temperature environment provided by the heating system in the furnace. At the same time, the atmosphere control system will adjust the atmosphere in the furnace to ensure the smooth progress of the calcination reaction.

[0003] The flue gas discharged from the roasting furnace has a high temperature and contains a large amount of dust. The main components of the dust are aluminum hydroxide and aluminum oxide, which have certain economic value, so they need to be recovered. Traditional flue gas dust recovery devices cannot recover dust and flue gas waste heat at the same time. In addition, after a period of use, the filter element of the traditional flue gas dust recovery device is easily clogged, and it cannot continuously clean the filter element, which affects the effect of the filter element on filtering dust in the flue gas, resulting in poor dust recovery effect. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a dust recovery device for the flue gas of a roasting furnace. The reciprocating swing assembly drives the gas pipe to rotate reciprocatingly within a range of 90 degrees. The gas pipe drives multiple nozzles to rotate, so that the compressed air sprayed from the multiple nozzles continuously cleans the filter cartridge. The first motor drives the filter cartridge to rotate 90 degrees each time, and then adjusts the cleaning position of the filter cartridge to achieve comprehensive and continuous cleaning of the filter cartridge, thereby improving the effect of the filter cartridge on filtering dust in the flue gas. The serpentine heat exchange tube can recover the waste heat in the flue gas to prevent waste of heat energy.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a dust recovery device in roasting furnace flue gas, comprising:

[0006] A shell, a smoke inlet pipe, a water inlet pipe and a water outlet pipe are connected and arranged on the side wall of the shell, the water outlet pipe is arranged near the bottom of the shell, the water inlet pipe is located below the smoke inlet pipe and above the water outlet pipe, and the water inlet pipe and the water outlet pipe are respectively provided with a water inlet valve and a water outlet valve;

[0007] A filter assembly, the filter assembly comprising a support plate, a first connecting ring, a filter cartridge, a second connecting ring, a limiting ring plate and a driving assembly, the support plate being arranged on the inner wall of the shell and being located below the smoke inlet pipe and above the water inlet pipe, the first connecting ring being rotatably arranged on the support plate, the filter cartridge being arranged on the top of the first connecting ring, the second connecting ring being arranged on the top of the filter cartridge, three dust exhaust ports being provided on the support plate and located on the outside of the filter cartridge, the limiting ring plate being arranged on the inner wall of the shell near the top, the second connecting ring being rotatably arranged in the limiting ring plate, the top of the shell being connected to a smoke exhaust pipe, the smoke exhaust pipe being located on the inner side of the second connecting ring, and the driving assembly being arranged on the top of the shell for driving the filter cartridge to rotate;

[0008] A cleaning assembly, the cleaning assembly comprising a first smoke baffle, an air inlet pipe, an air delivery pipe, a plurality of extension pipes, a plurality of nozzles, a pair of second smoke baffles, four third smoke baffles and a reciprocating swing assembly, the first smoke baffle being arranged on a support plate and being located on the inner side of a filter cartridge, the cross section of the first smoke baffle being an equilateral right angle and being right-angled away from the smoke inlet pipe, the ends of the first smoke baffle being slidably connected to the inner walls of the filter cartridge, the first connecting ring and the second connecting ring, the air inlet pipe passing through the side wall and the support plate of the shell, one end of the air inlet pipe being connected to an air supply device and the other end being rotatably connected to an air delivery pipe, the air delivery pipe being rotatably arranged on the first smoke baffle and the filter cartridge, a plurality of the extension pipes are connected and arranged on the air supply pipe, a plurality of the nozzles are arranged at the ends of the plurality of extension pipes close to the filter cartridge side, the reciprocating swing assembly is arranged on the top of the shell body to drive the air supply pipe to swing back and forth, a pair of the second smoke baffles are arranged on the inner wall of the shell body and the position corresponds to the first smoke baffle, four third smoke baffles are evenly distributed on the outer walls of the first connecting ring, the filter cartridge and the second connecting ring, the second smoke baffles and the third smoke baffles are slidably connected, a dust guide pipe is connected and arranged on the support plate, the dust guide pipe extends vertically downward for a certain distance, and the dust guide pipe is connected and arranged on the air guide pipe;

[0009] The serpentine heat exchange tube is arranged on the side wall of the first smoke baffle plate close to the smoke inlet pipe, and the inlet and outlet of the serpentine heat exchange tube are connected to the circulating water supply device.

[0010] Preferably, the drive assembly includes a first motor, a gear and an outer gear ring, the first motor is arranged at the top of the shell and the output shaft passes through the top wall of the shell, the gear is arranged on the output shaft of the first motor, the outer gear ring is arranged on the outer wall of the second connecting ring, and the gear is meshingly connected with the outer gear ring.

[0011] Preferably, a thrust ball bearing is provided between the support plate and the first connecting ring, and a deep groove ball bearing is provided between the limiting ring plate and the second connecting ring.

[0012] Preferably, a dust guide limit ring is provided on the support plate and located on the outside of the first connecting ring. The outer wall of the dust guide limit ring is a slope, and the inner wall is slidably connected to the first connecting ring. A through hole is opened on each of the third smoke baffle plates, and the dust guide limit ring passes through multiple through holes.

[0013] Preferably, the reciprocating swing assembly includes a rotating rod, a first transmission rod, a first transmission shaft, a second transmission rod, a second transmission shaft, a turntable and a second motor. The rotating rod is arranged on the top of the air pipe and is rotatably arranged on the top wall of the shell. One end of the first transmission rod is connected to the rotating rod, and the other end is rotatably connected to the first transmission shaft. One end of the second transmission rod is rotatably connected to the first transmission shaft, and the other end is rotatably connected to the second transmission shaft. The second transmission shaft is arranged at a position near the edge of the bottom of the turntable. The second motor is arranged at the top of the shell and the output shaft passes through the top wall of the shell and is connected to the center position of the top of the turntable.

[0014] Preferably, a rotary joint is provided between the air delivery pipe and the air inlet pipe.

[0015] Preferably, the air guide pipe is tilted downward at a certain angle, and the bottom outlet of the air guide pipe is higher than the bottom outlet of the dust guide pipe in the vertical direction.

[0016] The present invention provides a device for recovering dust from smoke in a roasting furnace, which has the following beneficial effects:

[0017] 1. The reciprocating swing assembly of the present invention drives the gas pipe to rotate reciprocatingly within a range of 90 degrees, and the gas pipe drives multiple nozzles to rotate, so that the compressed air sprayed from the multiple nozzles continuously cleans the filter cartridge. The first motor drives the filter cartridge to rotate 90 degrees each time, and then adjusts the cleaning position of the filter cartridge to achieve comprehensive and continuous cleaning of the filter cartridge, thereby improving the effect of the filter cartridge on filtering dust in the flue gas. The serpentine heat exchange tube can recover the waste heat in the flue gas to prevent waste of heat energy.

[0018] 2. The thrust ball bearing of the present invention is used to reduce the friction between the first connecting ring and the support plate when it rotates, and the deep groove ball bearing is used to reduce the friction between the second connecting ring and the limit ring plate when it rotates; the inner wall of the dust guide limit ring is slidably connected to the first connecting ring, which is used to limit the first connecting ring, and the outer wall of the dust guide limit ring is an inclined surface, so that dust can slide down when it falls on its surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 A top view of the present invention;

[0021] Figure 3 for Figure 2Sectional view in the AA direction;

[0022] Figure 4 for Figure 3 A magnified schematic diagram of part C;

[0023] Figure 5 for Figure 3 The enlarged schematic diagram of the D part;

[0024] Figure 6 for Figure 2 Sectional view in the middle BB direction;

[0025] Figure 7 It is a front view of the present invention;

[0026] Figure 8 for Figure 7 Cross-sectional view in the EE direction;

[0027] Fig. 9 for Figure 8 Enlarged schematic diagram of part F.

[0028] In the figure: 1, shell; 2, smoke inlet pipe; 3, water inlet pipe; 3-1, water inlet valve; 4, water outlet pipe; 4-1, water outlet valve; 5, smoke exhaust pipe; 6, serpentine heat exchange pipe; 7, first motor; 8, second motor; 9, air inlet pipe; 10, rotary joint; 11, air delivery pipe; 12, extension pipe; 13, nozzle; 14, rotating rod; 15, first transmission rod; 16, second transmission rod; 17, first transmission shaft; 18, second transmission Shaft; 19, turntable; 20, support plate; 20-1, dust outlet; 21, first connecting ring; 22, thrust ball bearing; 23, filter cartridge; 24, second connecting ring; 25, deep groove ball bearing; 26, limit ring plate; 27, outer gear ring; 28, gear; 29, dust guide pipe; 30, air guide pipe; 31, dust guide limit ring; 32, first smoke baffle; 33, second smoke baffle; 34, third smoke baffle; 34-1, through hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-9 The present invention provides a technical solution: a dust recovery device in the smoke of a roasting furnace, comprising:

[0031] A shell body 1, a smoke inlet pipe 2, a water inlet pipe 3 and a water outlet pipe 4 are connected and arranged on the side wall of the shell body 1, the water outlet pipe 4 is arranged near the bottom of the shell body 1, the water inlet pipe 3 is located below the smoke inlet pipe 2 and above the water outlet pipe 4, and a water inlet valve 3-1 and a water outlet valve 4-1 are arranged on the water inlet pipe 3 and the water outlet pipe 4 respectively;

[0032] The smoke generated by the roasting furnace enters the interior of the shell 1 through the smoke inlet pipe 2, and is connected to the external water supply device through the water inlet pipe 3, so that water for settling dust can be transported into the shell 1. The water outlet pipe 4 is connected to the external water pumping device, so that the water in the shell 1 can be discharged to the outside. The water inlet valve 3-1 and the water outlet valve 4-1 are preferably solenoid valves to control the on-off of the water inlet pipe 3 and the water outlet pipe 4;

[0033] A filter assembly, the filter assembly includes a support plate 20, a first connecting ring 21, a filter cartridge 23, a second connecting ring 24, a limiting ring plate 26 and a driving assembly. The support plate 20 is arranged on the inner wall of the shell 1 and is located below the smoke inlet pipe 2 and above the water inlet pipe 3. The first connecting ring 21 is rotatably arranged on the support plate 20. The filter cartridge 23 is arranged on the top of the first connecting ring 21. The second connecting ring 24 is arranged on the top of the filter cartridge 23. Three dust exhaust ports 20-1 are opened on the support plate 20 and located on the outside of the filter cartridge 23. The limiting ring plate 26 is arranged on the inner wall of the shell 1 near the top. The second connecting ring 24 is rotatably arranged in the limiting ring plate 26. The top of the shell 1 is connected to a smoke exhaust pipe 5, and the smoke exhaust pipe 5 is located on the inner side of the second connecting ring 24. The driving assembly is arranged on the top of the shell 1 to drive the filter cartridge 23 to rotate;

[0034] When the driving assembly drives the second connecting ring 24 to rotate, the second connecting ring 24 drives the filter cartridge 23 to rotate, and the filter cartridge 23 drives the first connecting ring 21 to rotate on the support plate 20. The limiting ring plate 26 limits the second connecting ring 24 to prevent the second connecting ring 24 from deviating during rotation. The driving assembly can accurately adjust the circumferential position of the filter cartridge 23, so that the part to be cleaned on the filter cartridge 23 can be rotated to the position of the cleaning assembly. Please refer to the position of the three dust outlets 20-1 on the support plate 20. Figure 8 As shown in the mark in, after the smoke generated by the roasting furnace enters the housing 1, the smoke diffuses in the housing 1. When the smoke passes through the filter cartridge 23, the filter cartridge 23 filters the smoke. The dust filtered by the filter cartridge 23 falls downward from the three dust exhaust ports 20-1 into the water. After passing through the filter cartridge 23, the smoke is discharged from the smoke exhaust pipe 5. The smoke exhaust pipe 5 is connected to the external draft device, and the external draft device is used to extract the smoke in the housing 1.

[0035] A cleaning assembly, the cleaning assembly includes a first smoke baffle 32, an air inlet pipe 9, an air delivery pipe 11, multiple extension pipes 12, multiple nozzles 13, a pair of second smoke baffles 33, four third smoke baffles 34 and a reciprocating swing assembly, the first smoke baffle 32 is arranged on the support plate 20 and is located on the inner side of the filter cartridge 23, the cross-section of the first smoke baffle 32 is an equilateral right angle and is right-angled away from the smoke inlet pipe 2, the end of the first smoke baffle 32 is slidably connected to the inner wall of the filter cartridge 23, the first connecting ring 21 and the second connecting ring 24, the air inlet pipe 9 passes through the side wall of the shell 1 and the support plate 20, one end of the air inlet pipe 9 is connected to the air supply device, and the other end is rotatably connected to the air delivery pipe 11, and the air delivery pipe 11 is rotatably arranged on the first smoke baffle 32 and the filter cartridge 23, multiple extension tubes 12 are connected and arranged on the air delivery pipe 11, multiple nozzles 13 are arranged at the ends of the multiple extension tubes 12 close to the filter cartridge 23, a reciprocating swing assembly is arranged on the top of the shell 1 to drive the air delivery pipe 11 to swing back and forth, a pair of second smoke baffles 33 are arranged on the inner wall of the shell 1 and the position corresponds to the first smoke baffle 32, four third smoke baffles 34 are evenly distributed on the outer walls of the first connecting ring 21, the filter cartridge 23 and the second connecting ring 24, the second smoke baffles 33 and the third smoke baffles 34 are slidably connected, a dust guide pipe 29 is connected and arranged on the support plate 20, the dust guide pipe 29 extends vertically downward for a certain distance, and an air guide pipe 30 is connected and arranged on the dust guide pipe 29;

[0036] The first smoke baffle 32 is arranged between the support plate 20 and the top wall of the shell 1. The first smoke baffle 32 is used to block and guide the smoke inside the filter cartridge 23, so that the smoke inside the filter cartridge 23 is discharged from the smoke exhaust pipe 5 and less enters the cleaning chamber composed of the first smoke baffle 32, a pair of second smoke baffles 33, a pair of third smoke baffles 34, the shell 1 and the support plate 20. The four third smoke baffles 34 are arranged in a cross shape, and the position of the pair of second smoke baffles 33 corresponds to the position of the first smoke baffle 32. When the filter cartridge 23 rotates, each pair of adjacent third smoke baffles 34 can correspond to the position of a pair of second smoke baffles 33 (see Figure 8As shown), when the filter cartridge 23 is cleaned, compressed air is delivered to the air inlet pipe 9 by the external air supply device, and the compressed air is delivered from the air inlet pipe 9 to the air delivery pipe 11, and then delivered to multiple extension pipes 12, and then sprayed out from multiple nozzles 13. The reciprocating swing component drives the air delivery pipe 11 to rotate reciprocatingly, so as to clean a quarter of the filter cartridge 23. The water level height in the housing 1 is located between the bottom outlet of the dust guide pipe 29 and the outlet of the air guide pipe 30. A liquid level monitoring device (a water level gauge capable of transmitting electrical signals, not shown in the figure) is provided in the housing 1. The liquid level monitoring device The water level in the housing 1 is controlled by the linkage of the water inlet valve 3-1 and the water outlet valve 4-1 through the control device, and the cleaned dust falls into the dust guide pipe 29. Part of the dust falls directly from the dust guide pipe 29 into the water for sedimentation, and the other part of the dust is discharged from the air guide pipe 30 by the flowing air and blown to the surface of the sedimentation water for sedimentation. After repeated filtration and sedimentation, the dust in the flue gas is completely recovered. After cleaning for a period of time, the water outlet valve 4-1 is opened, and the water in the housing 1 is discharged through the pumping device, and the discharged water is processed by the filter press to recover the dust.

[0037] The serpentine heat exchange tube 6 is arranged on the side wall of the first smoke baffle 32 close to the smoke inlet pipe 2, and the inlet and outlet of the serpentine heat exchange tube 6 are connected to the circulating water supply device;

[0038] The circulating water supply device circulates the water used for heat exchange in the serpentine heat exchange tube 6, so that the serpentine heat exchange tube 6 recovers the waste heat of the flue gas.

[0039] As an embodiment of the present invention, the driving assembly includes a first motor 7, a gear 28 and an outer gear ring 27. The first motor 7 is arranged at the top of the shell 1 and the output shaft passes through the top wall of the shell 1. The gear 28 is arranged on the output shaft of the first motor 7, and the outer gear ring 27 is arranged on the outer wall of the second connecting ring 24. The gear 28 is meshed and connected with the outer gear ring 27.

[0040] In this embodiment, when the first motor 7 is started, the output shaft of the first motor 7 drives the connected gear 28 to rotate, the gear 28 drives the meshing connected outer gear ring 27 to rotate, the outer gear ring 27 drives the connected second connecting ring 24 to rotate, and the second connecting ring 24 drives the connected filter cartridge 23 to rotate. The first motor 7 is preferably a servo motor to achieve accurate adjustment of the circumferential position of the filter cartridge 23.

[0041] As an embodiment of the present invention, a thrust ball bearing 22 is provided between the support plate 20 and the first connecting ring 21 , and a deep groove ball bearing 25 is provided between the limiting ring plate 26 and the second connecting ring 24 .

[0042] In this embodiment, the thrust ball bearing 22 is used to reduce the friction between the first connecting ring 21 and the support plate 20 when the first connecting ring 21 rotates, and the deep groove ball bearing 25 is used to reduce the friction between the second connecting ring 24 and the limit ring plate 26 when the second connecting ring 24 rotates.

[0043] As an embodiment of the present invention, a dust guide limit ring 31 is provided on the support plate 20 and located on the outer side of the first connecting ring 21. The outer wall of the dust guide limit ring 31 is a slope, and the inner wall is slidably connected to the first connecting ring 21. A through hole 34-1 is opened on each third smoke baffle plate 34, and the dust guide limit ring 31 passes through multiple through holes 34-1.

[0044] In this embodiment, the inner wall of the dust guide limit ring 31 is slidably connected to the first connecting ring 21 for limiting the first connecting ring 21. The outer wall of the dust guide limit ring 31 is a slope so that dust can slide down when it falls on its surface.

[0045] As an embodiment of the present invention, the reciprocating swing assembly includes a rotating rod 14, a first transmission rod 15, a first transmission shaft 17, a second transmission rod 16, a second transmission shaft 18, a turntable 19 and a second motor 8. The rotating rod 14 is arranged at the top of the air supply pipe 11 and is rotatably arranged on the top wall of the shell 1. One end of the first transmission rod 15 is connected to the rotating rod 14, and the other end is rotatably connected to the first transmission shaft 17. One end of the second transmission rod 16 is rotatably connected to the first transmission shaft 17, and the other end is rotatably connected to the second transmission shaft 18. The second transmission shaft 18 is arranged at a position near the edge of the bottom of the turntable 19. The second motor 8 is arranged at the top of the shell 1 and the output shaft passes through the top wall of the shell 1 and is connected to the center position of the top of the turntable 19.

[0046] In this embodiment, when the output shaft of the second motor 8 rotates, it drives the connected turntable 19 to rotate, and the turntable 19 drives the second transmission shaft 18 to perform circular motion (that is, the second transmission shaft 18 revolves around the center of the turntable 19), and the second transmission shaft 18 drives the rotatably connected second transmission rod 16 to move, and the second transmission rod 16 drives the rotatably connected first transmission shaft 17 to move, and the first transmission shaft 17 drives the first transmission rod 15 to rotate, and the first transmission rod 15 drives the air pipe 11 to rotate, and the air pipe 11 drives the multiple connected extension pipes 12 to rotate, and the multiple extension pipes 12 drive the multiple nozzles 13 to rotate, so that the second motor 8 drives the multiple nozzles 13 to rotate in a reciprocating cycle, so that the compressed air sprayed from the multiple nozzles 13 cleans the filter cartridge 23.

[0047] As an embodiment of the present invention, a rotary joint 10 is provided between the air delivery pipe 11 and the air inlet pipe 9 .

[0048] In this embodiment, the rotary joint 10 is fixedly connected to the air inlet pipe 9 and is rotatably connected to the air delivery pipe 11, so that when the filter cartridge 23 is cleaned, the air inlet pipe 9 does not move but the air delivery pipe 11 rotates.

[0049] As an embodiment of the present invention, the air guide pipe 30 is tilted downward at a certain angle, and the bottom outlet of the air guide pipe 30 is higher than the bottom outlet of the dust guide pipe 29 in the vertical direction.

[0050] In this embodiment, the air guide pipe 30 blows the flowing air carrying dust onto the surface of the settling water, so that the dust settles in the water.

[0051] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and no longer explains the electrical control.

[0052] The working principle and use process of the present invention:

[0053] When in use, the water inlet valve 3-1 on the water inlet pipe 3 is opened, and water is injected into the housing 1 through the external water supply device. A liquid level monitoring device for monitoring the water level is provided in the housing 1. When the water level reaches a certain value between the bottom outlet of the air guide pipe 30 and the bottom outlet of the dust guide pipe 29, the liquid level monitoring device sends a signal to the control system to close the water inlet valve 3-1.

[0054] The smoke generated by the roasting furnace is transported into the shell 1 through the smoke inlet pipe 2, and the smoke diffuses in the shell 1. When the smoke contacts the water in the shell 1, the dust in the smoke will be settled into the water, and the smoke that has not contacted the water passes through the filter cartridge 23, and the filter cartridge 23 filters the dust in the smoke. The filtered dust falls downward from the three dust exhaust ports 20-1 opened on the support plate 20 into the water, and the external induced draft device extracts the smoke through the smoke exhaust pipe 5;

[0055] When the filter cartridge 23 is clogged after being used for a period of time and needs to be cleaned, compressed air is delivered to the air inlet pipe 9 through the external air supply device, and the compressed air is delivered to the air delivery pipe 11 through the rotary joint 10. The compressed air in the air delivery pipe 11 then flows to the multiple extension pipes 12, and is sprayed onto the inner wall of the filter cartridge 23 through the multiple nozzles 13. The second motor 8 drives the air delivery pipe 11 to rotate reciprocatingly within a range of 90 degrees, thereby continuously cleaning a quarter of the filter cartridge 23. When the cleaning of this part is completed, the first motor 7 arranged on the top of the shell 1 is started, and the first motor 7 drives the filter cartridge 23 to rotate 90 degrees, so that the other quarter of the filter cartridge 23 that has not been cleaned The filter cartridge 23 is rotated to the cleaning chamber corresponding to the right angle of the first smoke baffle 32 to clean the part. After cleaning, the circumferential position of the filter cartridge 23 is adjusted in the same way to achieve comprehensive cleaning of the filter cartridge 23. The cleaned dust is transported outward from the dust guide pipe 29 and the air guide pipe 30 and settles in the water. After cleaning for a period of time, the water outlet valve 4-1 is opened, and the water in the shell 1 is discharged through the pumping device. The discharged water is processed by the filter press to recover the dust. During the cleaning process, the circulating water supply device circulates the circulating water in the serpentine heat exchange tube 6, so that the water in the serpentine heat exchange tube 6 exchanges heat with the flue gas, thereby recovering the waste heat of the flue gas.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust recovery device in roasting furnace flue gas, characterized in that: include: A shell (1), a smoke inlet pipe (2), a water inlet pipe (3) and a water outlet pipe (4) are arranged on a side wall of the shell (1), the water outlet pipe (4) is arranged near the bottom of the shell (1), the water inlet pipe (3) is located below the smoke inlet pipe (2) and above the water outlet pipe (4), and a water inlet valve (3-1) and a water outlet valve (4-1) are arranged on the water inlet pipe (3) and the water outlet pipe (4), respectively; A filter assembly, the filter assembly comprising a support plate (20), a first connecting ring (21), a filter cartridge (23), a second connecting ring (24), a limit ring plate (26) and a drive assembly, the support plate (20) being arranged on the inner wall of a housing (1) and being located below a smoke inlet pipe (2) and above a water inlet pipe (3), the first connecting ring (21) being rotatably arranged on the support plate (20), the filter cartridge (23) being arranged on the top of the first connecting ring (21), and the second connecting ring (24) being arranged on the filter cartridge ( The top of the housing (1) is provided with a smoke exhaust pipe (5), the smoke exhaust pipe (5) is located on the inner side of the second connecting ring (24), and the driving assembly is arranged at the top of the housing (1) to drive the filter cartridge (23) to rotate; A cleaning assembly, the cleaning assembly comprising a first smoke baffle (32), an air inlet pipe (9), an air delivery pipe (11), a plurality of extension pipes (12), a plurality of nozzles (13), a pair of second smoke baffles (33), four third smoke baffles (34) and a reciprocating swing assembly, the first smoke baffle (32) being arranged on a support plate (20) and being located on the inner side of a filter cartridge (23), the cross section of the first smoke baffle (32) being an equilateral right angle and being right-angled away from the smoke inlet pipe (2), the end of the first smoke baffle (32) being slidably connected to the inner wall of the filter cartridge (23), a first connecting ring (21) and a second connecting ring (24), the air inlet pipe (9) penetrating the side wall of a housing (1) and the support plate (20), one end of the air inlet pipe (9) being connected to an air supply device and the other end being rotatably connected to the air delivery pipe (11), the air delivery pipe (11) being rotatably arranged on the first smoke baffle (32) ) and the filter cartridge (23), a plurality of the extension tubes (12) are connected and arranged on the air supply pipe (11), a plurality of the nozzles (13) are arranged at the ends of the plurality of extension tubes (12) close to the filter cartridge (23), the reciprocating swing assembly is arranged at the top of the shell (1) for driving the air supply pipe (11) to swing back and forth, a pair of the second smoke baffles (33) are arranged on the inner wall of the shell (1) and the positions correspond to the first smoke baffles (32), four third smoke baffles (34) are evenly distributed on the outer walls of the first connecting ring (21), the filter cartridge (23) and the second connecting ring (24), the second smoke baffles (33) and the third smoke baffles (34) are slidably connected, a dust guide pipe (29) is connected and arranged on the support plate (20), the dust guide pipe (29) extends vertically downward for a certain distance, and an air guide pipe (30) is connected and arranged on the dust guide pipe (29); A serpentine heat exchange tube (6), wherein the serpentine heat exchange tube (6) is arranged on the side wall of the first smoke baffle (32) close to the smoke inlet pipe (2), and the inlet and outlet of the serpentine heat exchange tube (6) are connected to the circulating water supply device.

2. The device for recovering dust from roasting furnace flue gas according to claim 1, characterized in that: The driving assembly comprises a first motor (7), a gear (28) and an outer gear ring (27); the first motor (7) is arranged at the top of the housing (1) and the output shaft passes through the top wall of the housing (1); the gear (28) is arranged on the output shaft of the first motor (7); the outer gear ring (27) is arranged on the outer wall of the second connecting ring (24); the gear (28) is meshingly connected with the outer gear ring (27).

3. The device for recovering dust from roasting furnace flue gas according to claim 1, characterized in that: A thrust ball bearing (22) is arranged between the support plate (20) and the first connecting ring (21), and a deep groove ball bearing (25) is arranged between the limiting ring plate (26) and the second connecting ring (24).

4. The device for recovering dust from roasting furnace flue gas according to claim 3, characterized in that: A dust guide limit ring (31) is provided on the support plate (20) and located outside the first connecting ring (21); the outer wall of the dust guide limit ring (31) is an inclined surface, and the inner wall is slidably connected to the first connecting ring (21); each of the third smoke baffle plates (34) is provided with a through hole (34-1), and the dust guide limit ring (31) passes through a plurality of through holes (34-1).

5. The device for recovering dust from roasting furnace flue gas according to claim 1, characterized in that: The reciprocating swing assembly comprises a rotating rod (14), a first transmission rod (15), a first transmission shaft (17), a second transmission rod (16), a second transmission shaft (18), a rotating disk (19) and a second motor (8); the rotating rod (14) is arranged at the top of the air delivery pipe (11) and is rotatably arranged on the top wall of the housing (1); one end of the first transmission rod (15) is connected to the rotating rod (14) and the other end is rotatably connected to the first transmission shaft (17); one end of the second transmission rod (16) is rotatably connected to the first transmission shaft (17) and the other end is rotatably connected to the second transmission shaft (18); the second transmission shaft (18) is arranged at a position close to the edge of the bottom of the rotating disk (19); the second motor (8) is arranged at the top of the housing (1) and the output shaft passes through the top wall of the housing (1) and is connected to the center position of the top of the rotating disk (19).

6. The device for recovering dust from roasting furnace flue gas according to claim 1, characterized in that: A rotary joint (10) is provided between the air delivery pipe (11) and the air inlet pipe (9).

7. The device for recovering dust from roasting furnace flue gas according to claim 1, characterized in that: The air guide pipe (30) is arranged to be tilted downward at a certain angle, and the bottom outlet of the air guide pipe (30) is higher than the bottom outlet of the dust guide pipe (29) in the vertical direction.

Images