Ash removal device

Abstract

The utility model relates to the technical field of thermal power plant equipment, in particular to an ash removal device, which can have small influence on the filtering effect after ash removal of a filtering assembly, and comprises a flue, a filtering shell, a dust collecting hopper, the filtering assembly and an ash removal assembly, and the central axis of a first air inlet coincides with the central axis of the filtering assembly; the ash removal assembly is arranged in the air inlet cavity and distributed on the filtering face of the filtering assembly and the inner side face of the flue, and the first exhaust port communicates with the air outlet cavity. The ash removal assembly comprises a first fixing ring, a first rotating ring embedded in the first fixing ring and sliding relative to the first fixing ring, a second fixing ring fixedly arranged on the inner side face of the flue, a second rotating ring embedded in the second fixing ring and sliding relative to the second fixing ring, and a connecting sleeve connected with the first rotating ring and the second rotating ring. The connecting sleeve is provided with a first ash removal area arranged on the outer side of the filtering assembly in a sleeving mode and a second ash removal area extending into the flue.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power plant equipment, in particular to a dust cleaning device. Background Art

[0002] As the country's environmental protection requirements for coal-fired power plants become increasingly stringent, in order to ensure that emission standards meet national regulations, the original flue gas of the unit should be treated by a desulfurization system and then filtered before being discharged into the atmosphere.

[0003] The flue is connected to the filter. After being used for a period of time, dust accumulates on the filter screen inside the filter due to screening, collision, retention, diffusion, static electricity and other effects, and it needs to be cleaned to avoid affecting the filtering effect. Traditional cleaning devices, such as authorization announcement No. CN206731715U, disclose a vibrating cleaning device, which specifically discloses a catalyst placement container, a pneumatic vibrator, a control valve, an air pump, an ash hopper, a bag dust collector and an induced draft fan; the bottom of the catalyst placement container is a screen, and an ash hopper is arranged under the catalyst placement container; a pneumatic vibrator is installed in the middle position below the screen, and the pneumatic vibrator is connected to the air pump through a pipeline, and a control valve is installed on the pipeline. When the catalyst surface is seriously covered with dust, the control valve is opened and the air pump is turned on at the same time to shake off the accumulated dust on the catalyst surface; the accumulated dust is drawn out through the induced draft fan and enters the bag dust collector for easy cleaning.

[0004] However, at the beginning of filtration, a layer of dust gathers on the surface of the filter, which is called the primary layer. The primary layer becomes the main filtering layer of the filter. Relying on the effect of the primary layer, the filter with a larger mesh can obtain a better filtering effect. However, it is difficult to control the cleaning effect by vibration cleaning, and it is easy to destroy the primary dust while removing the surface dust, thus affecting the filtering efficiency of the filter. Utility Model Content

[0005] Therefore, in view of the above-mentioned problems, the utility model provides a dust cleaning device which has little influence on the filtering effect.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The filter element is a filter element which is provided in the filter housing, and the ... A first rotating ring inside the first fixed ring and sliding relative to the first fixed ring, a second fixed ring fixed on the inner side of the flue, a second rotating ring embedded in the second fixed ring and sliding relative to the second fixed ring, a connecting sleeve connecting the first rotating ring and the second rotating ring, a driving motor and a transmission component, the connecting sleeve is a spiral structure, the connecting sleeve has a first cleaning area sleeved on the outside of the filter component and a second cleaning area extending into the flue, the inner surface of the connecting sleeve located at the first cleaning area is provided with a plurality of first brushes distributed in rows along the axial direction of the connecting sleeve, and the first brushes are distributed at intervals, an air nozzle is provided on the inner surface of the connecting sleeve located at the first cleaning area and opposite to the first brush, a second brush with a spiral structure is provided on the outer surface of the connecting sleeve located at the second cleaning area, and the driving motor is connected to the connecting sleeve through a transmission component.

[0008] Furthermore, the angle between the central axis of the nozzle of the air jet head and the central axis of the connecting sleeve is 60° to 80°.

[0009] Furthermore, the transmission assembly includes a first sprocket arranged on the output shaft of the driving motor, a second sprocket arranged on the first rotating ring, and a chain wound around the first sprocket and the second sprocket.

[0010] Furthermore, an air duct is provided at the input end of the flue, and the air duct is an inverted "U"-shaped structure. The two ends of the air duct have a second air inlet, a second dust exhaust port, and a second exhaust port distributed between the second air inlet and the second dust exhaust port. The air duct is connected to the flue through the second exhaust port, and a switch valve is provided at the second dust exhaust port.

[0011] Furthermore, a filter screen is provided at the second exhaust port.

[0012] By adopting the above technical scheme, the beneficial effects of the utility model are as follows: in the dust cleaning device, the gas enters the air inlet chamber in the filter housing through the flue and the first air inlet, and is filtered by the filter component and then discharged into the air outlet chamber. The dust attached to the filter surface of the filter component and the dust accumulated on the flue are regularly cleaned by the dust cleaning component to ensure the filtering efficiency of the filter component. At the same time, the dust cleaning component can better retain the initial dust on the filter component and reduce the filtering effect of the filter component. Specifically, the driving motor drives the connecting sleeve to rotate through the transmission component. Since the connecting sleeve has a spiral structure and is sleeved on the outside of the filter component The inner surface of the connecting sleeve in the first cleaning area is provided with a row of first brushes and nozzles. During the continuous rotation of the connecting sleeve, the first brushes brush off the dust in their respective areas, and the air nozzles spray air to assist in removing the dust in the area. The air jet from the outside to the inside can better retain the initial dust stuck on the filter hole, thereby ensuring the influence of the initial dust on the filter assembly, and then the cleaning effect of the filter assembly reduces the influence of the filtering effect. At the same time, the second brush in the second cleaning area extending into the flue brushes off the dust on the inner surface of the flue. The second brush with a spiral structure can sweep out the dust, and the cleaning effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view structural schematic diagram of an embodiment of the utility model;

[0014] Figure 2 It is a left-side structural schematic diagram of an embodiment of the utility model;

[0015] Figure 3 It is a cross-sectional structural schematic diagram of an embodiment of the utility model;

[0016] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION

[0017] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0018] The utility model embodiment is:

[0019] refer to Figures 1 to 4As shown, a dust cleaning device comprises a flue 1, a filter housing 2, a dust collecting hopper 3, a filter assembly 4 and a dust cleaning assembly 5, wherein the filter housing 2 has a first air inlet 21 located at the side, a first exhaust port 22 located at the upper end and a first dust exhaust port 23 located at the lower end, a mounting seat 6 is provided in the filter housing 2, the filter assembly 4 is arranged on the mounting seat 6, the filter assembly 4 is in a cylindrical structure, and the circumferential outer side surface of the filter assembly 4 has a filter surface 41, and the filter housing 2 is divided into an air inlet and a dust outlet through the mounting seat 6 and the filter assembly 4. The first air inlet 21 and the first dust outlet 23 are respectively connected to the air inlet 201, the flue 1 is connected to the first air inlet 21, the central axis of the first air inlet 21 coincides with the central axis of the filter assembly 4, the dust cleaning assembly 5 is arranged in the air inlet 201, and is distributed on the filter surface 41 of the filter assembly 4 and the inner side of the flue 1, the first exhaust port 22 is connected to the air outlet 202, the dust cleaning assembly 5 includes a first fixing ring 51 fixedly arranged on the mounting seat 6, a first dust outlet 23 embedded in the first dust outlet 23, and a first dust outlet 23 connected to the air inlet 201. A first rotating ring 52 is arranged in a fixed ring 51 and slides relatively with the first fixed ring 51, a second fixed ring 53 is fixed on the inner side of the flue 1, a second rotating ring 54 is embedded in the second fixed ring 53 and slides relatively with the second fixed ring 53, a connecting sleeve 55 connecting the first rotating ring 52 and the second rotating ring 54, a driving motor 56 and a transmission component 57, wherein the connecting sleeve 55 is a spiral structure, and the connecting sleeve 55 has a first cleaning area 501 sleeved on the outside of the filter component 4 and a second cleaning area 501 extending into the flue 1 Area 502, the inner surface of the connecting sleeve 55 located in the first cleaning area 501 is provided with a plurality of first brushes 7 distributed in rows along the axial direction of the connecting sleeve 55, and the first brushes 7 are distributed at intervals, and an air nozzle 8 is provided on the inner surface of the connecting sleeve 55 located in the first cleaning area 501 and opposite to the first brush 7, and a second brush 9 with a spiral structure is provided on the outer surface of the connecting sleeve 55 located in the second cleaning area 502, and the driving motor 56 is connected to the connecting sleeve 55 through a transmission assembly 57.

[0020] In the present cleaning device, gas enters the air inlet chamber 201 in the filter housing 2 through the flue 1 and the first air inlet 21, and is filtered by the filter assembly 4 and enters the air outlet chamber 202 before being discharged. The dust attached to the filter surface 41 of the filter assembly 4 and the dust accumulated on the flue 1 are regularly removed by the cleaning assembly 5 to ensure the filtering efficiency of the filter assembly 4. At the same time, the cleaning assembly 5 can better retain the initial dust on the filter assembly 4, thereby reducing the filtering effect of the filter assembly 4. Specifically, the driving motor 56 drives the connecting sleeve 55 to rotate through the transmission assembly 57. Since the connecting sleeve 55 is a spiral structure and the first cleaning area 501 arranged on the outside of the filter assembly 4 The inner surface of the connecting sleeve 55 is provided with a row of first brushes 7 and a nozzle 8. During the continuous rotation of the connecting sleeve 55, the first brushes 7 brush off the dust in the respective areas, and the air nozzles 8 spray air to assist in removing the dust in the areas. The jet from outside to inside can better retain the initial dust stuck on the filter holes of the filter assembly 4, thereby ensuring the influence of the initial dust on the filter assembly 4, and further reducing the influence of the cleaning effect of the filter assembly 4 on the filtering effect. At the same time, the second brush 9 extending into the second cleaning area 502 of the flue 1 brushes off the dust on the inner surface of the flue 1. The second brush 9 with a spiral structure can sweep out the dust, and the cleaning effect is good.

[0021] Furthermore, the angle between the central axis of the nozzle of the air spray head 8 and the central axis of the connecting sleeve 55 is 60° to 80°, preferably 65°, so that dust is sprayed in an inclined manner, reducing the impact on the primary dust stuck on the filter holes of the filter assembly 4 and ensuring the filtering effect.

[0022] In this embodiment, the transmission assembly 57 includes a first sprocket 571 disposed on the output shaft of the driving motor 56 , a second sprocket 572 disposed on the first rotating ring 52 , and a chain 573 wound around the first sprocket 571 and the second sprocket 572 .

[0023] In addition, an air duct 10 is provided at the input end of the flue 1, and the air duct 10 is in an inverted "U" shape. The two ends of the air duct 10 have a second air inlet 101, a second dust exhaust port 102, and a second exhaust port 103 distributed between the second air inlet 101 and the second dust exhaust port 102. The air duct 10 is connected to the flue 1 through the second exhaust port 103. A switch valve 104 is provided at the second dust exhaust port 102, and a filter 105 is provided at the second exhaust port 103. When the gas is transported through the air duct 10, the air duct 10 in an inverted "U" shape and the second exhaust port 103 are provided between the second air inlet 101 and the second dust exhaust port 102, so that dust can accumulate at the second dust exhaust port 102 to achieve primary filtration, and then secondary filtration is performed through the filter 105 to improve the cleanliness of gas discharge.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A dust cleaning device, characterized in that: The filter assembly comprises a flue, a filter housing, a dust hopper, a filter assembly and a ash cleaning assembly, the filter housing having a first air inlet located on the side, a first exhaust port located on the upper end and a first dust exhaust port located on the lower end, the filter housing being provided with a mounting seat, the filter assembly being arranged on the mounting seat, the filter assembly being in a cylindrical structure, the circumferential outer side surface of the filter assembly having a filter surface, the filter housing being divided into an air inlet chamber and an air outlet chamber through the mounting seat and the filter assembly, the first air inlet chamber and the first dust exhaust port being communicated with the air inlet chamber respectively, the flue being connected to the first air inlet chamber, the central axis of the first air inlet chamber coincides with the central axis of the filter assembly, the ash cleaning assembly being arranged in the air inlet chamber and being distributed on the filter surface of the filter assembly and the inner side surface of the flue, the first exhaust port being communicated with the air outlet chamber, the ash cleaning assembly comprising a first fixing ring fixedly arranged on the mounting seat, a first fixing ring embedded in the first fixing ring A first rotating ring in a fixed ring and sliding relative to the first fixed ring, a second fixed ring fixed on an inner side surface of the flue, a second rotating ring embedded in the second fixed ring and sliding relative to the second fixed ring, a connecting sleeve connecting the first rotating ring and the second rotating ring, a driving motor and a transmission assembly, wherein the connecting sleeve is in a spiral structure, the connecting sleeve has a first cleaning area sleeved on the outside of the filter assembly and a second cleaning area extending into the flue, the inner surface of the connecting sleeve located in the first cleaning area is provided with a plurality of first brushes distributed in rows along the axial direction of the connecting sleeve, and the first brushes are distributed at intervals, an air nozzle is provided on the inner surface of the connecting sleeve located in the first cleaning area and on the surface opposite to the first brush, a second brush with a spiral structure is provided on the outer surface of the connecting sleeve located in the second cleaning area, and the driving motor is connected to the connecting sleeve through a transmission assembly.

2. The dust cleaning device according to claim 1, characterized in that: The angle between the central axis of the nozzle of the air jet head and the central axis of the connecting sleeve is 60° to 80°.

3. The dust cleaning device according to claim 2, characterized in that: The transmission assembly comprises a first sprocket arranged on the output shaft of the driving motor, a second sprocket arranged on the first rotating ring, and a chain wound around the first sprocket and the second sprocket.

4. The dust cleaning device according to any one of claims 1 to 3, characterized in that: An air duct is provided at the input end of the flue, and the air duct is an inverted "U"-shaped structure. The two ends of the air duct have a second air inlet, a second dust exhaust port, and a second exhaust port distributed between the second air inlet and the second dust exhaust port. The air duct is connected to the flue through the second exhaust port, and a switch valve is provided at the second dust exhaust port.

5. The dust cleaning device according to claim 4, characterized in that: A filter screen is provided at the second exhaust port.

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