CN113350915A - Bag type dust removal device and using method thereof - Google Patents

Abstract

The invention relates to a dust removal device, in particular to a bag type dust removal device and a using method thereof, wherein the bag type dust removal device comprises a box body with a closed cavity, wherein an air inlet is formed in the box body; an ash hopper, a filter bag and a main exhaust pipe are respectively arranged in the closed cavity from bottom to top, and a negative pressure fan is arranged on the main exhaust pipe; the rotary baffle device is further arranged between the ash bucket and the filter bag and comprises a driving device and a baffle, the driving device is installed on the inner wall of the box body, one end of the baffle is connected with the driving device, and the driving device drives the baffle to rotate around the connecting point. The invention provides a bag type dust removal device capable of efficiently removing dust with small particle size.

Description

Bag type dust removal device and using method thereof

Technical Field

The invention relates to a dust removal device, in particular to a bag type dust removal device and a using method thereof.

Background

The bag type dust removing equipment is a high-efficiency dust collector, when dust-containing gas enters the bag type dust removing equipment, dust with large particles and large specific gravity settles and falls into an ash bucket under the action of gravity, and when the gas containing the dust with small particle size passes through a filter bag, the dust is blocked by the filter bag, so that the purified gas is obtained. The prior art of bag type dust collector, such as the patent with publication number "CN 201470241U", discloses a sonic bag type dust collector, in which the gas containing fine dust directly passes through the filter bag from the air inlet, and the removal efficiency of the dust with small particle size needs to be improved. The invention provides a bag type dust removal device for efficiently removing small-particle-size dust.

Disclosure of Invention

The invention provides a bag type dust collector for efficiently removing dust with small particle size.

The second technical problem to be solved by the invention is to provide a using method of the bag type dust collector, so that small-particle-size dust can be removed efficiently.

A bag type dust removal device comprises a box body with a closed cavity, wherein an air inlet is formed in the box body; an ash hopper, a filter bag and a main exhaust pipe are respectively arranged in the closed cavity from bottom to top, and a negative pressure fan is arranged on the main exhaust pipe; the rotary baffle device is further arranged between the ash bucket and the filter bag and comprises a driving device and a baffle, the driving device is installed on the inner wall of the box body, one end of the baffle is connected with the driving device, and the driving device drives the baffle to rotate around the connecting point.

In this structure, take the dirt gas to enter into sealed cavity from the air intake in, the big particle size dust falls into the ash bucket because of the dead weight, the baffle rotates around the tie point low-speed under drive arrangement's drive, the rest part dust can fall into the ash bucket under the effect of baffle resistance, the dust of the little particle size of part bumps under baffle pivoted effort in addition, little particle size dust collides each other and combines to form great particle size dust, the great particle size dust that forms or fall into the ash bucket under the action of gravity, or is filtered by the filter bag, avoid the dust particle size too little and directly pass through the filter bag. Therefore, the efficiency of removing the small-particle-size dust is effectively improved by rotating the baffle device.

Further, the rotating baffle device comprises a first rotating baffle device and a second rotating baffle device which are oppositely arranged, and a gap for accommodating airflow to pass through is reserved between the first rotating baffle device and the second rotating baffle device. The dust-carrying gas in the closed cavity can be fully stirred by arranging the first rotating baffle device and the second rotating baffle device, so that the collision rate of small-particle-size dust is better, and the gaps for accommodating the air flow to pass through are reserved between the first rotating baffle device and the second rotating baffle device, so that the dust-carrying gas can pass through and fall into the dust hopper after collision, thereby further improving the dust removal efficiency and prolonging the service life of the filter bag.

Furthermore, the bag-type dust collector also comprises a back suction switching device; the back suction switching device is arranged between the air inlet and the closed chamber; the back suction switching device comprises a back suction fan and a shell; the back suction fan is arranged in the shell; one end of the shell is communicated with the air inlet through a reverse suction valve, and the other end of the shell is communicated with the closed chamber through an inner air inlet valve; the air inlet is communicated with the closed chamber through an air inlet valve. When dust attached to the filter bag affects filtration, the reverse suction switching device is started, the air inlet valve is closed, the reverse suction valve and the inner air inlet valve are opened, and the dust falls off from the filter bag under the action of reverse suction, so that the effect of cleaning the filter bag is achieved.

Further, an installation plate connected with the box body is arranged between the exhaust main pipe and the filter bag; the mounting plate is provided with a sound wave generator and is provided with a through air hole. The sound wave generator is fixed above the filter bag by arranging the mounting plate, and the filter bag is vibrated by sound waves emitted by the sound wave generator, so that the falling of dust on the filter bag is accelerated; the mounting plate is provided with gas holes so that gas can reach the exhaust manifold.

Furthermore, the bag-type dust collector also comprises an intelligent control system, wherein the intelligent control system comprises a pressure sensor, a gas concentration detection device and a control module; the filter bag divides the closed cavity into a gas purifying chamber and a gas processing chamber from top to bottom; the pressure sensor is arranged in the air purifying chamber and used for detecting the pressure difference between the inside of the air purifying chamber and the outside of the box body; the gas concentration detection device is arranged in the gas processing chamber and is used for detecting the dust concentration in the gas processing chamber; and the control module controls the on-off of the air inlet valve, the reverse air suction valve and the inner air inlet valve according to the pressure difference value detected by the pressure sensor and the dust concentration value detected by the gas concentration detection device. When dust attached to the filter bag changes to be more and influences the flow of gas passing through the filter bag, the pressure difference between the inside of the air purifying chamber and the outside of the box body is increased under the action of the negative pressure fan, and when the control module judges that the dust attached to the filter bag is too much according to the pressure difference value measured by the pressure sensor, the control module controls the air inlet valve to be closed, and the reverse air suction valve and the inner air inlet valve are opened; the control module judges whether the dust purification in the current area reaches the expected degree according to the dust concentration detected by the gas concentration detection device, and then controls the stop work of each valve and each fan.

Furthermore, bag collector still includes running gear, running gear includes telescopic support frame and walking wheel, telescopic support frame's one end is connected with the box, and the other end is connected with the walking wheel. The walking wheels can be controlled to contact with the ground or the supporting frame contacts with the ground by adjusting the telescopic bracket, and the walking wheels push the dust removal device to move when contacting with the ground.

Furthermore, the bag-type dust collector also comprises a rain-proof system which is arranged at the top of the box body; the rainproof system comprises a rainproof shed and two telescopic devices respectively positioned at two sides of the box body; two ends of the rain-proof shed are respectively connected with the two telescopic devices through retaining rings; the telescopic device can be stretched along the oblique upper part outside the box body. When the rain-proof shed is rainy, the expansion device extends to the oblique upper part along the outer side of the box body, and then the rain-proof shed can be opened.

The use method of the bag type dust collector comprises the following steps:

s1: after all valves are closed, the negative pressure fan is started for a period of time to enable the interior of the box body to be in a negative pressure state;

s2: opening an air inlet valve to enable the dust-carrying gas to enter the gas treatment chamber; starting a driving device to drive the rotary baffle device to rotate; removing dust in the dust-carrying gas;

s3: when the pressure sensor detects that the pressure difference between the inside of the clean air chamber and the outside of the box body is increased to a first preset pressure difference value, the air inlet valve and the negative pressure fan are closed, and the back suction valve, the inner air inlet valve, the back suction fan and the sound wave generator are opened; the gas in the closed box chamber is sucked back to remove the dust attached to the filter bag; when the pressure sensor detects that the pressure difference between the inside of the clean air chamber and the outside of the tank body is reduced to a second preset pressure difference value, executing the step S2 again;

s4: step S3 is repeatedly executed until the gas concentration is reduced to a preset concentration value, and the dust removal operation is ended.

The negative pressure fan makes the closed chamber in a negative pressure state, and the dust removal work is started by opening the air inlet valve; when the pressure sensor detects that the pressure difference between the inside of the clean air chamber and the outside of the box body is increased to a first preset pressure difference value, performing filter bag dust removal; and when the gas concentration is reduced to a preset concentration value, the dust content of the external gas is low, and the dust removal work is finished.

Has the advantages that: the baffle plate device is rotated to enable dust particles to collide with each other, small-particle-size dust forms large-particle dust due to collision, the large-particle dust falls off the dust hopper due to self weight or is filtered by the filter bag, the small-particle-size dust is prevented from directly passing through the filter bag, and the filter bag has higher removal efficiency on the large-particle-size dust, so that the removal efficiency of the small-particle-size dust can be effectively improved; the reverse air suction system and the sound generator are arranged to effectively remove dust on the filter bag, so that the dust removal work can be continuously and efficiently carried out, and meanwhile, the service life of the filter bag can be prolonged; the intelligent control system is arranged to intelligently control the on-off of the air inlet valve, the reverse suction valve and the inner air inlet valve according to the pressure difference value detected by the pressure sensor and the dust concentration value detected by the gas concentration detection device; the traveling device is arranged, so that the bag type dust removal device can move to a designated place conveniently; the bag-type dust collector can be used in rainy days due to the arrangement of the rain-proof system.

Drawings

The invention is described in further detail below with reference to the figures and specific embodiments.

Fig. 1 is a schematic view of the overall structure of a bag-type dust collector.

Fig. 2 is a partially enlarged schematic view at a in fig. 1.

FIG. 3 is a schematic diagram of a smart control panel.

Reference numerals: 1. a box body; 2. an air inlet; 3. an ash hopper; 4. a filter bag; 5. a main exhaust duct; 6. a negative pressure fan; 7. a rotating baffle device; 71. a first rotating baffle device; 72. a second rotating baffle device; 8. a suck-back switching device; 81. a back suction fan; 82. a housing; 9. a back draft valve; 10. an inner air inlet valve; 11. mounting a plate; 12. a pressure sensor; 13. a gas concentration detection device; 14. a telescopic support frame; 15. a traveling wheel; 16. a telescoping device; 17. a rain-proof shed; 18. an intelligent control system; 19. an acoustic wave generator; 20. an air inlet valve; 21. a main switch of the intelligent control system; 22. a differential pressure display module; 23. a sound wave frequency display module; 24. a sound generator control module; 25. a rotating device information display module; 26. a rotating device control module; 27. a gas concentration display module; 28. a telescoping device control module; 29. a fan control module; 30. a valve control module.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example one

The bag-type dust collector shown in fig. 1 and 2 comprises a box body 1 with a closed cavity, the bag-type dust collector in this embodiment is composed of two box bodies 1 which are symmetrically distributed, an air inlet 2 is arranged in the box body 1, an ash hopper 3, a filter bag 4 and an exhaust main pipe 5 are respectively arranged in the closed cavity from bottom to top, and a negative pressure fan 6 is arranged on the exhaust main pipe 5; a first rotating baffle device 71 and a second rotating baffle device 72 which are oppositely arranged are further arranged between the ash hopper 3 and the filter bag 4, the rotating baffle device 7 comprises a driving device and a baffle plate, the driving device is installed on the inner wall of the box body 1, one end of the baffle plate is connected with the driving device, and the driving device drives the baffle plate to rotate around a connection point. Dust-carrying gas enters the closed chamber from the air inlet 2, large-particle dust firstly falls into the dust hopper 3 due to self weight, part of dust falls into the dust hopper 3 under the resistance action of the baffle, and part of dust collides in the process to form larger particle dust due to the low-speed rotation of the rotary baffle, and the larger particle dust falls into the dust hopper 3 due to self weight or is filtered by the filter bag 4 subsequently; a gap for accommodating airflow is always reserved between the first rotating baffle device 71 and the second rotating baffle device 72, so that the air can pass through and larger particle dust after collision can fall into the dust hopper 3.

As a further scheme of this embodiment, the bag-type dust collector further comprises a back suction switching device 8 and a sound wave generator 19; the back suction switching device 8 is arranged between the air inlet 2 and the closed chamber and comprises a back suction fan 81 and a shell 82; the back suction fan 81 is arranged in the shell 82; one end of the shell 82 is communicated with the air inlet 2 through a reverse air inlet valve 9, and the other end of the shell is communicated with the closed chamber through an inner air inlet valve 10; the air inlet 2 is communicated with the closed chamber through an air inlet valve 20. The sound wave generator 19 is fixed above the filter bag 4 through a mounting plate 11, and the mounting plate 11 is provided with an air hole for air to pass through, is connected with the box body 1 and is arranged between the exhaust main pipe 5 and the filter bag 4. When the filter bag 4 is adhered with more dust, the reverse suction switching device 8 and the sound wave generator 19 are started, the dust on the filter bag 4 falls off from top to bottom under the action of reverse suction wind and sound waves, and the dust passes through the rotary baffle device 7 until the dust hopper 3 is discharged.

As a further scheme of this embodiment, the bag-type dust collector further includes an intelligent control system 18, where the intelligent control system 18 includes a pressure sensor 12, a gas concentration detection device 13, and a control module; the filter bag 4 divides the closed cavity into a gas purifying chamber and a gas processing chamber from top to bottom; the pressure sensor 12 is arranged in the air purifying chamber and used for detecting the pressure difference between the inside of the air purifying chamber and the outside of the box body; the gas concentration detection device 13 is arranged in the gas processing chamber and is used for detecting the dust concentration in the gas processing chamber; the control module controls the on-off of the air inlet valve 20, the reverse air suction valve 9 and the inner air inlet valve 10 according to the pressure difference value detected by the pressure sensor 12 and the dust concentration value detected by the gas concentration detection device 13. Setting a pressure difference value when the excessive dust affects the flow of the gas passing through the filter bag 4 as a first preset pressure difference value, and setting a pressure difference value for starting dust removal as a second preset pressure difference value; the automatic control switch of the fan is turned on, the pressure sensor 12 transmits the measured corresponding value to the intelligent control system 18, when the measured differential pressure value reaches a first preset differential pressure value, the dust removal work of the filter bag 4 is carried out, the negative pressure fan 6 is closed, the back suction fan 81 is opened, the air inlet valve 20 is closed, and the back suction valve 9 and the inner air inlet valve 10 are opened; when the differential pressure value is reduced to a second preset differential pressure value, the negative pressure fan 6 is automatically opened, the back suction fan 81 and the sound generator 19 are automatically closed, the back suction valve 9 is closed, a small amount of dust in a chamber formed by the back suction fan and the inner air inlet valve 10 is waited to be removed, the inner air inlet valve 10 is closed after 1-3 minutes, then the air inlet valve 20 is opened, and the dust removal work is continued. When the concentration value transmitted to the intelligent control system 18 by the gas concentration detection device 13 reaches a preset concentration value, the dust removal operation is finished.

As a further scheme of the embodiment, the intelligent control system 18 includes an intelligent control panel as shown in fig. 3, the intelligent control panel includes an intelligent control system main switch 21, a display module and a control module, the display module includes a pressure difference display module 22, an acoustic wave frequency display module 23, a rotating device information display module 25 and a gas concentration display module 27; the control modules include a sonic generator control module 24, a rotary device control module 26, a telescoping device control module 28, a fan control module 29, and a valve control module 30. Corresponding parameters can be visually observed through the display module, and the control module can control the corresponding device so as to control the bag-type dust collector.

As a preferable scheme of this embodiment, the bag dust collector further includes a traveling device, the traveling device includes a telescopic support frame 14 and a traveling wheel 15, one end of the telescopic support frame 14 is connected with the box body 1, and the other end is connected with the traveling wheel 15. The telescopic support frame 14 is extended, the walking wheels 15 are changed from a suspension state to be in contact with the ground, and the bag type dust removal device can be moved; when the bag-type dust removal device moves to a designated position, the telescopic support frame 14 is contracted, at the moment, the telescopic support frame 14 is in contact with the ground, and the dust removal device finishes walking.

As a preferable scheme of the embodiment, the bag-type dust collector further comprises a rain-proof system which is arranged at the top of the box body 1; the rainproof system comprises a rainproof shed 17 and two telescopic devices 16 which are respectively positioned at two sides of the box body 1; two ends of the rain-proof shed 17 are respectively connected with the two telescopic devices 16 through retaining rings; the telescopic device 16 can be extended and contracted along the upper oblique direction outside the box body 1. When it rains, the expansion device 16 is extended to support the rain-proof shed 17, so that the normal operation of the dust removal device can be ensured, and the corrosion and the rusting of the dust removal device can be effectively prevented.

Example two

The use method of the bag type dust collector comprises the following steps:

s1: after all valves are closed, the negative pressure fan 6 is started for a period of time to enable the interior of the box body 1 to be in a negative pressure state;

s2: opening the air inlet valve 20 to allow the dust-laden gas to enter the gas processing chamber; starting a driving device to drive the rotary baffle device 7 to rotate; removing dust in the dust-carrying gas;

s3: setting a pressure difference value when the excessive dust affects the flow of the gas passing through the filter bag 4 as a first preset pressure difference value, and setting a pressure difference value for starting dust removal as a second preset pressure difference value; opening an automatic fan control switch, closing an air inlet valve 20 and a negative pressure fan 6 when a pressure sensor 12 detects that the pressure difference value between the inside of the clean air chamber and the outside of the box body 1 is increased to a first preset pressure difference value, and opening a reverse suction valve 9, an inner air inlet valve 10, a reverse suction fan 81 and a sound wave generator 19; the gas in the closed box chamber is sucked back to remove the dust attached to the filter bag 4; when the pressure sensor 12 detects that the pressure difference between the inside of the clean air chamber and the outside of the tank 1 is reduced to a second preset pressure difference value, the step S2 is executed again;

s4: setting the gas concentration value in the gas processing chamber when the gas processing chamber has less dust as the preset concentration value, and repeating the step S3 until the gas concentration is reduced to the preset concentration value, and ending the dust removal operation.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.

Claims (8)

1. A bag type dust removal device comprises a box body (1) with a closed cavity, wherein an air inlet (2) is formed in the box body (1); an ash hopper (3), a filter bag (4) and an exhaust main pipe (5) are respectively arranged in the closed cavity from bottom to top, and a negative-pressure fan (6) is arranged on the exhaust main pipe (5); the dust collector is characterized in that a rotary baffle device (7) is further arranged between the dust hopper (3) and the filter bag (4), the rotary baffle device (7) comprises a driving device and a baffle, the driving device is installed on the inner wall of the box body (1), one end of the baffle is connected with the driving device, and the driving device drives the baffle to rotate around a connecting point.

2. A baghouse device according to claim 1, characterized in that the rotating baffle device (7) comprises a first rotating baffle device (71) and a second rotating baffle device (72) arranged opposite each other, and that a gap for accommodating the passage of an air flow is always left between the first rotating baffle device (71) and the second rotating baffle device (72).

3. A bag house device according to claim 1, further comprising a suck-back switching device (8); the back suction switching device (8) is arranged between the air inlet (2) and the closed chamber; the back suction switching device (8) comprises a back suction fan (81) and a shell (82); the back suction fan (81) is arranged in the shell (82); one end of the shell (82) is communicated with the air inlet (2) through a reverse air suction valve (9), and the other end of the shell is communicated with the closed chamber through an inner air inlet valve (10); the air inlet (2) is communicated with the closed chamber through an air inlet valve (20).

4. The baghouse apparatus of claim 3, wherein: a mounting plate (11) connected with the box body (1) is arranged between the main exhaust duct (5) and the filter bag (4); the mounting plate (11) is provided with a sound wave generator (19), and the mounting plate (11) is provided with a through air hole.

5. The bag house device of claim 4, further comprising an intelligent control system (18), the intelligent control system (18) comprising a pressure sensor (12), a gas concentration detection device (13) and a control module; the filter bag (4) divides the closed cavity into a gas purifying chamber and a gas processing chamber from top to bottom; the pressure sensor (12) is arranged in the air purifying chamber and used for detecting the pressure difference between the inside of the air purifying chamber and the outside of the box body (1); the gas concentration detection device (13) is arranged in the gas processing chamber and is used for detecting the dust concentration in the gas processing chamber; the control module controls the on-off of the air inlet valve (20), the reverse suction valve (9) and the inner air inlet valve (10) according to the pressure difference value detected by the pressure sensor (12) and the dust concentration value detected by the gas concentration detection device (13).

6. The bag-type dust collector according to claim 1, further comprising a walking device, wherein the walking device comprises a telescopic support frame (14) and walking wheels (15), one end of the telescopic support frame (14) is connected with the box body (1), and the other end of the telescopic support frame is connected with the walking wheels (15).

7. The bag-type dust collector of claim 1, further comprising a rain-proof system arranged on the top of the box body (1); the rainproof system comprises a rainproof shed (17) and two telescopic devices (16) which are respectively positioned at two sides of the box body (1); two ends of the rain-proof shed (17) are respectively connected with the two telescopic devices (16) through retaining rings; the telescopic device (16) can be stretched along the oblique upper part of the outer side of the box body (1).

8. The use method of the bag type dust collector is characterized by comprising the following steps:

s1: after all valves are closed, the negative pressure fan (6) is started for a period of time to enable the interior of the box body (1) to be in a negative pressure state;

s2: opening an air inlet valve (20) to enable the dust-carrying gas to enter the gas processing chamber; starting a driving device to drive a rotary baffle device (7) to rotate; removing dust in the dust-carrying gas;

s3: when the pressure sensor (12) detects that the pressure difference value between the inside of the clean air and the outside of the box body (1) is increased to a first preset pressure difference value, the air inlet valve (20) and the negative pressure fan (6) are closed, and the back suction valve (9), the inner air inlet valve (10), the back suction fan (81) and the sound wave generator (19) are opened; the gas in the closed box chamber is sucked back to remove the dust attached to the filter bag (4); when the pressure sensor (12) detects that the pressure difference value between the inside of the clean air and the outside of the box body (1) is reduced to a second preset pressure difference value, the step S2 is executed again;

s4: step S3 is repeatedly executed until the gas concentration is reduced to a preset concentration value, and the dust removal operation is ended.

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