Large bag type dust collector used under high-pressure working condition

Abstract

The invention discloses a large bag type dust collector used under a high pressure working condition, the large bag type dust collector comprises an air inlet pipe, a shell and a top cover, the left side of the shell is provided with the air inlet pipe communicated with the shell, the inner top surface of the shell is provided with a mounting plate, and the bottom of a metal filter bag is connected with the top surface of a mounting frame through a first spring; the peripheral surface of the mounting frame is connected with the inner wall of the shell through a second spring, and a rapping hammer is mounted between the left side of the mounting frame and the inner wall of the shell and is made of a magnet material; the invention provides a large bag type dust collector used under a high-pressure working condition, and solves the problems that an existing bag type dust collector cannot meet two conditions of online dust removal and positive-pressure operation above 0.6 Mpa at the same time, the online dust removal generally adopts a pulse-jet dust removal process, and compressed gas below 0.6 Mpa is adopted to perform reverse blowing on a metal filter bag to realize dust removal; and after the pressure is increased to 0.6 Mpa or above, the pulse-jet ash removal process cannot be applied to the traditional bag type dust collector.

Description

Technical Field

[0001] The present invention relates to the technical field of dust collectors, and particularly to a large bag filter for high-pressure working conditions. Background Art

[0002] A large bag filter is an efficient and reliable industrial dust removal device. Its structure is relatively simple without complex moving parts, and daily maintenance and repair are relatively easy. It is widely used in dust treatment and flue gas purification in many industries such as iron and steel, cement, electric power, chemical industry, metallurgy, building materials, waste incinerators, asphalt mixing plants, and grain processing. When in use, the dust-containing gas enters the ash hopper from the air inlet. Large-particle dust directly falls to the bottom of the ash hopper due to gravity and inertia, playing a role of pre-dust collection. Then, the dust-containing gas passes through a metal filter bag equipped with a metal skeleton inside. During the filtration process, finer dust is intercepted on the surface of the metal filter bag, while clean gas escapes through the gaps between the fibers of the metal filter bag, achieving the purpose of purification. As the dust layer on the surface of the metal filter bag continuously thickens, the resistance of the metal filter bag to the airflow gradually increases. When the resistance reaches a certain level, the dust cleaning device starts to work. For dust with a particle size of 0.5 to 5 microns, the dust removal efficiency of the bag filter can be as high as over 99.99%, which can effectively capture fine dust, meet strict environmental protection requirements, can handle a wide range of air volumes, ranging from several hundred cubic meters per hour to tens of thousands of cubic meters per hour, can adapt to different properties of dust, is not sensitive to the characteristics of dust, is not affected by dust and resistance, and can be used for flue gas dust removal in various industrial fields such as iron and steel, cement, electric power, and chemical industry. It is manufactured using mature technologies and high-quality materials, with stable equipment operation, low failure rate, and small maintenance workload, and can maintain good dust removal effects for a long time.

[0003] Existing bag filters cannot meet the two conditions of on-line dust cleaning and positive pressure operation above 0.6 Mpa at the same time. On-line dust cleaning usually adopts the process of pulse jet dust cleaning, using compressed gas below 0.6 Mpa to blow back the metal filter bag for cleaning. After the pressure is increased to above 0.6 Mpa, the pulse jet dust cleaning process cannot be applied to traditional bag filters. Therefore, small basket filters suitable for high-pressure working conditions can only achieve off-line manual dust cleaning and cannot achieve on-line dust cleaning.

[0004] Therefore, it is necessary to provide a large bag filter for high-pressure working conditions to solve the above technical problems. Summary of the Invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a large-scale bag dust collector for use under high-pressure conditions to solve the problem that the existing bag dust collector cannot simultaneously meet the two conditions of online cleaning and positive pressure operation above 0.6Mpa. Online cleaning usually adopts a pulse jet cleaning process, and uses compressed gas below 0.6Mpa to back-blow the metal filter bags to achieve cleaning. After the pressure is increased to above 0.6Mpa, the pulse jet cleaning process will not be able to be applied to traditional bag dust collectors. Therefore, small basket filters suitable for high-pressure conditions can only achieve offline manual cleaning, and cannot achieve online cleaning.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A large-scale bag dust collector used under high-pressure working conditions comprises: an air inlet pipe, a shell, and a top cover; An air intake pipe connected to the shell is installed on the left side, and a mounting plate is installed on the inner top surface of the shell. The mounting plate is provided with mounting holes in a circular array, and the holes are mounted and connected to the outer peripheral surface of the top opening of the metal filter bag. The bottom of the metal filter bag is mounted and connected to the top surface of the mounting frame via a first spring, and the outer peripheral surface of the mounting frame is mounted and connected to the inner wall of the shell via a second spring. A rapping hammer is installed between the left side of the mounting frame and the inner wall of the shell, and the rapping hammer is made of magnetic material. A power box is installed on the outer wall of the shell, and an electric coil is inside the power box.

[0007] In one embodiment, an ash discharge mechanism is installed at the bottom of the shell, and the ash discharge mechanism is composed of an ash hopper, an ash discharge pipe, and a negative pressure fan. The top of the ash hopper is welded integrally with the shell, and the bottom of the ash hopper is installed and connected to the top middle section of the ash discharge pipe. The right side of the ash discharge pipe is connected to the negative pressure fan, and the left side of the ash discharge pipe is connected to the ash removal mechanism.

[0008] In one embodiment, a dredging rod is installed at the center of the bottom surface of the installation frame, and a toggle plate is installed in a ring array on the outer peripheral surface of the dredging rod, and the bottom of the dredging rod is located at the inner bottom of the ash hopper.

[0009] In one embodiment, a top cover is installed on the top of the shell, the top cover is installed and connected to the shell via a flange, and an exhaust pipe is installed on the top of the top cover.

[0010] In one embodiment, a protective mechanism is installed at the extended end of the exhaust pipe, and the protective mechanism consists of a box body, a cover plate, a water tank, a water inlet pipe, an atomizing nozzle, a drain pipe, and a waste water box. Both sides of the box body are connected to two groups of exhaust pipes, a cover plate is installed on the top of the box body, a water tank is installed on the top of the cover plate, a water inlet pipe is installed on one side of the water tank, an atomizing nozzle is installed on the bottom surface of the cover plate, and a plurality of atomizing nozzles are installed at intervals, and a drain pipe is installed at the bottom of the box body, a threaded groove is opened at the bottom of the drain pipe, and the drain pipe is threadedly screwed into the waste water box below.

[0011] In one embodiment, the left side of the ash discharge pipe is connected to the ash removal mechanism, and the ash removal mechanism consists of a cleaning box, an outlet, an inspection port, a guide plate, a first filter plate, a fixed plate, and a second filter plate. The cleaning box as a whole is a horizontally placed cylindrical structure, and a guide plate is installed inside the cleaning box. The guide plate as a whole is an L-shaped structure with an arc in the vertical section. The first filter plate is installed on the bottom surface of the horizontal section of the guide plate, and the first filter plate is located below the ash discharge pipe. An outlet is installed on the top of the cleaning box, and the outlet is connected to the fan on the outside and is located on the top of the right guide area of ​​the guide plate.

[0012] In one embodiment, an inspection port is provided on the outer wall of the cleaning box in the guide area, a second filter plate is installed in the inspection port, the second filter plate is installed and connected by fixing plate bolts, and two groups of the second filter plates are arranged at intervals and are arranged in a tangential direction.

[0013] In one embodiment, in the initial state, the first filter plate and the second filter plate are both provided with a water-containing sponge layer.

[0014] The beneficial effects of the present invention are as follows: (1) When the electric coil in the power box of the present invention is energized, a magnetic field is generated, and the rapping hammer is attracted by magnetic force. When the electric coil is de-energized, the magnetic force disappears, and the rapping hammer raps the bottom mounting frame. After the mounting frame is rapped, it moves left and right under the action of the second spring, driving the removal of fly ash accumulated on the outer surface of the metal filter bag. At the same time, the mounting frame drives the metal filter bag to vibrate through the first spring, thereby further improving the cleaning effect of the metal filter bag.

[0015] (2) The present invention drives the dredging rod and the toggle plate to vibrate through the vibration of the installation frame, thereby synchronously transmitting the dust inside the ash hopper, dredging the dust accumulated in the ash hopper, avoiding blockage of ash discharge, and improving the stability of the overall device.

[0016] (3) The present invention sprays atomized water through an atomizing nozzle, which contacts the gas discharged from the exhaust pipe, so that the atomized water can wrap up the fine dust in the gas and drop it into the drain pipe below, and then enter the waste water box for collection, thereby further improving the gas purification effect, improving the practicality and stability of the device. At the same time, after the atomized water contacts the gas, it has the beneficial effects of cooling and reducing pressure, which is more in line with actual use.

[0017] (4) The present invention facilitates the removal and cleaning of the second filter plate by setting a fixed plate, thereby improving the convenience of maintenance. In the initial state, the first filter plate and the second filter plate are both provided with a water-containing sponge layer. The water-containing sponge layer structure helps to collect dust, which is convenient for subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall structure diagram of the present invention; Figure 2 This is a detailed diagram of the internal structure of the housing of the present invention; Figure 3 It is a detailed diagram of each component of the present invention after being disassembled; Figure 4 This is a detailed diagram of the internal structure of the dust collector of the present invention; Figure 5 This is a detailed diagram of the top cover and protective mechanism of the present invention; Figure 6 It is a detailed diagram of the interior of the dust removal mechanism of the present invention.

[0019] Among them, the names corresponding to the figure numbers are 1. air inlet pipe; 2. shell; 21. power box; 22. vibrating hammer; 23. mounting plate; 24. metal filter bag; 25. first spring; 26. mounting frame; 27. second spring; 28. dredging rod; 29. ​​toggle plate; 3. top cover; 31. exhaust pipe; 4. ash discharge mechanism; 41. ash hopper; 42. ash discharge pipe; 43. negative pressure fan; 5. protection mechanism; 51. box body; 52. cover plate; 53. water tank; 54. water inlet pipe; 55. atomizing nozzle; 56. drain pipe; 57. wastewater box; 6. ash removal mechanism; 61. cleaning box; 62. outlet; 63. inspection port; 64. guide plate; 65. first filter plate; 66. fixing plate; 67. second filter plate. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The embodiments of the present invention include but are not limited to the following embodiments.

[0021] like Figures 1 - 4 As shown, the present invention provides a large-scale bag dust collector for use under high-pressure working conditions, comprising: an air inlet pipe 1, a shell 2, and a top cover 3; like Figures 1 - 4As shown, an intake pipe 1 communicating with it is installed on the left side of the housing 2. An installation plate 23 is installed on the inner top surface of the housing 2. The installation plate 23 is provided with installation holes in an annular array, and the inner part of the holes is installed and connected to the outer peripheral surface of the top mouth of the metal filter bag 24. The bottom of the metal filter bag 24 is installed and connected to the top surface of the installation frame 26 through a first spring 25. The outer peripheral surface of the installation frame 26 is installed and connected to the inner wall of the housing 2 through a second spring 27. A vibration hammer 22 is installed between the left side of the installation frame 26 and the inner wall of the housing 2. The vibration hammer 22 is made of magnetic material. A power box 21 is installed on the outer wall of the housing 2. The inside of the power box 21 is an electric coil. When the electric coil in the power box 21 is energized, a magnetic field is generated, and the vibration hammer 22 is sucked up by magnetic force. After the electric coil is powered off, the magnetic force disappears, and the vibration hammer 22 vibrates the bottom installation frame 26. After the installation frame 26 is vibrated, it moves left and right under the action of the second spring 27, driving the removal of the fly ash accumulated on the outer surface of the metal filter bag 24, and simultaneously causing the installation frame 26 to drive the metal filter bag 24 to vibrate through the first spring 25, further improving the ash cleaning effect of the metal filter bag 24.

[0022] Preferably, in one embodiment, as Figure 2 shown, a dust discharging mechanism 4 is installed at the bottom of the housing 2. The dust discharging mechanism 4 is composed of a dust hopper 41, a dust discharging pipe 42, and a negative pressure fan 43. The top of the dust hopper 41 is integrally welded to the housing 2. The bottom of the dust hopper 41 is installed and connected to the middle section of the top of the dust discharging pipe 42. The right side of the dust discharging pipe 42 is communicated with the negative pressure fan 43. The left side of the dust discharging pipe 42 is communicated with the ash removing mechanism 6.

[0023] Preferably, in one embodiment, as Figure 4 shown, a dredging rod 28 is installed at the center of the bottom surface of the installation frame 26. The outer peripheral surface of the dredging rod 28 is provided with a plurality of stirring plates 29 in an annular array. The bottom of the dredging rod 28 is located at the inner bottom of the dust hopper 41. Through the vibration of the installation frame 26, the dredging rod 28 and the stirring plates 29 are driven to vibrate, synchronously driving the inside of the dust hopper 41, dredging the dust accumulated in the dust hopper 41, avoiding the situation of blocked ash discharge, and improving the use stability of the overall device.

[0024] Preferably, in one embodiment, as Figure 3 、 Figure 5 shown, a top cover 3 is installed on the top of the housing 2. The top cover 3 is installed and connected to the housing 2 through a flange. An exhaust pipe 31 is installed on the top of the top cover 3. The exhaust pipe 31 is used to discharge the gas filtered by the metal filter bag 24.

[0025] Preferably, in one embodiment, as Figure 5As shown in the figure, a protection mechanism 5 is installed at the extended end of the exhaust pipe 31. The protection mechanism 5 is composed of a box body 51, a cover plate 52, a water tank 53, a water inlet pipe 54, an atomizing nozzle 55, a drain pipe 56, and a waste water box 57. Both sides of the box body 51 are communicated with two groups of exhaust pipes 31. The cover plate 52 is installed on the top of the box body 51. The water tank 53 is installed on the top of the cover plate 52. The water inlet pipe 54 is installed on one side of the water tank 53. The atomizing nozzle 55 is installed on the bottom surface of the cover plate 52. A plurality of atomizing nozzles 55 are installed at intervals. The drain pipe 56 is installed at the bottom of the box body 51. A threaded groove is opened at the bottom opening of the drain pipe 56. The drain pipe 56 is connected with the waste water box 57 below by threaded screwing. During operation, atomized water is sprayed out through the atomizing nozzle 55 and contacts the gas discharged from the exhaust pipe 31, so that the atomized water can wrap the dust in the gas and fall into the drain pipe 56 below and enter the waste water box 57 for collection, further improving the purification effect of the gas, enhancing the practicability and the stability of the device during use. At the same time, after the atomized water contacts the gas, it has the beneficial effects of cooling and pressure reduction, which is more in line with the actual use.

[0026] Preferably, in one embodiment, as Figure 6 shown, the left side of the ash discharge pipe 42 is communicated with the ash removal mechanism 6. The ash removal mechanism 6 is composed of a cleaning box 61, an outlet 62, a maintenance opening 63, a guide plate 64, a first filter plate 65, a fixing plate 66, and a second filter plate 67. The cleaning box 61 is a horizontally placed cylindrical structure as a whole. A guide plate 64 is installed inside the cleaning box 61. The guide plate 64 is an L-shaped structure with a curved vertical section as a whole. The first filter plate 65 is installed on the bottom surface of the horizontal section of the guide plate 64. The first filter plate 65 is located below the ash discharge pipe 42. The outlet 64 is installed on the top of the cleaning box 61. The outside of the outlet 64 is connected to a fan, and the inside is at the top of the right diversion area of the guide plate 64.

[0027] Preferably, in one embodiment, as Figure 6 shown, a maintenance opening 63 is opened on the outer wall of the cleaning box 61 in the diversion area. A second filter plate 67 is installed in the maintenance opening 63. The second filter plate 67 is bolted and installed through the fixing plate 66. Two groups of the second filter plates 67 are arranged at intervals and are both arranged in a tangential direction. Through the setting of the fixing plate 66, it is convenient to remove and clean the second filter plate 67, improving the convenience of maintenance.

[0028] Preferably, in one embodiment, as Figure 6 shown, when the first filter plate 65 and the second filter plate 67 are in the initial state, a water-containing sponge layer is clamped between them. Through the structure of the water-containing sponge layer, it is helpful to collect dust and facilitate subsequent treatment.

[0029] The working principle of the present invention: During operation, when the electric coil in the power box 21 is energized, a magnetic field is generated, which attracts the rapping hammer 22 by magnetic force. When the electric coil is de-energized, the magnetic force disappears, and the rapping hammer 22 raps the bottom mounting frame 26. After the mounting frame 26 is rapped, it moves left and right under the action of the second spring 27, driving the removal of fly ash accumulated on the outer surface of the metal filter bag 24. At the same time, the mounting frame 26 drives the metal filter bag 24 to vibrate through the first spring 25, further improving the cleaning effect of the metal filter bag 24. Vibration drives the dredging rod 28 and the toggle plate 29 to vibrate, synchronously transmits the dust in the ash hopper 41, dredges the dust accumulated in the ash hopper 41, avoids the blockage of ash discharge, and improves the stability of the overall device. Atomized water is sprayed through the atomizing nozzle 55 and contacts the gas discharged from the exhaust pipe 31, so that the atomized water can wrap the fine dust in the gas and drop it into the drain pipe 56 below, and enter the waste water box 57 for collection, thereby further improving the purification effect of the gas, and improving the practicality and stability of the device.

[0030] The above embodiment is only one of the preferred implementation modes of the present invention and should not be used to limit the protection scope of the present invention. Any changes or modifications that are made to the main design concept and spirit of the present invention and have no substantive significance, and the technical problems they solve are still consistent with the present invention, should be included in the protection scope of the present invention.

Claims

1. A large-scale bag dust collector for use under high pressure conditions, characterized in that: include: Inlet pipe (1), housing (2), top cover (3); An air intake pipe (1) connected to the shell (2) is installed on the left side of the shell (2), and a mounting plate (23) is installed on the inner top surface of the shell (2). The mounting plate (23) is provided with mounting holes in a circular array, and the holes are mounted and connected to the outer peripheral surface of the top opening of the metal filter bag (24). The bottom of the metal filter bag (24) is mounted and connected to the top surface of the mounting frame (26) via a first spring (25), and the outer peripheral surface of the mounting frame (26) is mounted and connected to the inner wall of the shell (2) via a second spring (27). A rapping hammer (22) is installed between the left side of the mounting frame (26) and the inner wall of the shell (2), and the rapping hammer (22) is made of a magnetic material. A power box (21) is installed on the outer wall of the shell (2), and an electric coil is contained in the power box (21).

2. A large-scale bag dust collector for use under high pressure conditions according to claim 1, characterized in that: An ash discharge mechanism (4) is installed at the bottom of the shell (2), and the ash discharge mechanism (4) is composed of an ash hopper (41), an ash discharge pipe (42), and a negative pressure fan (43). The top of the ash hopper (41) is welded to the shell (2) in an integral manner, the bottom of the ash hopper (41) is connected to the middle section of the top of the ash discharge pipe (42), the right side of the ash discharge pipe (42) is connected to the negative pressure fan (43), and the left side of the ash discharge pipe (42) is connected to the ash removal mechanism (6).

3. A large-scale bag dust collector for use under high pressure conditions according to claim 1, characterized in that: A dredging rod (28) is installed at the center of the bottom surface of the installation frame (26), and a toggle plate (29) is installed in a ring array on the outer peripheral surface of the dredging rod (28). The bottom of the dredging rod (28) is located at the inner bottom of the ash hopper (41).

4. A large-scale bag dust collector for use under high pressure conditions according to claim 1, characterized in that: A top cover (3) is installed on the top of the shell (2); the top cover (3) and the shell (2) are installed and connected via a flange; and an exhaust pipe (31) is installed on the top of the top cover (3).

5. A large-scale bag dust collector for use under high pressure conditions according to claim 4, characterized in that: The extended end of the exhaust pipe (31) is provided with a protective mechanism (5), the protective mechanism (5) comprising a box body (51), a cover plate (52), a water tank (53), a water inlet pipe (54), an atomizing nozzle (55), a drain pipe (56), and a waste water box (57). Both sides of the box body (51) are connected to the two groups of exhaust pipes (31). The top of the box body (51) is provided with a cover plate (52), the top of the cover plate (52) is provided with a water tank (53), one side of the water tank (53) is provided with a water inlet pipe (54), the bottom surface of the cover plate (52) is provided with an atomizing nozzle (55), a plurality of the atomizing nozzles (55) are provided at intervals, and the bottom of the box body (51) is provided with a threaded groove, and the drain pipe (56) is screwed into the waste water box (57) below.

6. A large-scale bag dust collector for use under high pressure conditions according to claim 2, characterized in that: The left side of the ash discharge pipe (42) is connected to the ash removal mechanism (6), and the ash removal mechanism (6) is composed of a cleaning box (61), an outlet (62), an inspection port (63), a guide plate (64), a first filter plate (65), a fixing plate (66), and a second filter plate (67). The cleaning box (61) is a horizontally placed cylindrical structure. The guide plate (64) is installed inside the cleaning box (61). The guide plate (64) is an L-shaped structure with an arc in the vertical section. The first filter plate (65) is installed on the bottom surface of the horizontal section of the guide plate (64). The first filter plate (65) is located below the ash discharge pipe (42). The top of the cleaning box (61) is installed with an outlet (62). The outlet (62) is connected to the fan on the outside and is located on the top of the right guide area of ​​the guide plate (64).

7. A large-scale bag dust collector for use under high pressure conditions according to claim 6, characterized in that: An inspection opening (63) is provided on the outer wall of the cleaning box (61) in the guide area. A second filter plate (67) is installed in the inspection opening (63). The second filter plate (67) is bolted to the fixing plate (66). Two groups of the second filter plates (67) are arranged at intervals and are arranged in a tangential direction.

8. A large-scale bag dust collector for use under high pressure conditions according to claim 7, characterized in that: In the initial state, the first filter plate (65) and the second filter plate (67) are both provided with a water-containing sponge layer.

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