Boiler economizer outlet ash collecting device
By installing acoustic agglomeration and stationary blade cyclone separation devices at the economizer outlet, the problem of low efficiency of existing ash collection devices has been solved, achieving efficient collection of fly ash, improving the operating conditions of downstream boiler equipment, and enhancing the safety and economy of the boiler.
Patent Information
- Application Number
- CN202422889851.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-11-26
AI Technical Summary
The existing economizer outlet ash collection device has a simple structure and low ash collection efficiency, resulting in a large amount of fly ash being carried downstream of the boiler by the flue gas, causing wear and ash accumulation and blockage of equipment such as denitrification and air preheater, affecting the safety and economy of the boiler.
The system employs an acoustic agglomeration component and a coupled dust collector within the casing. The fly ash particles collide and agglomerate through acoustic agglomeration, increasing the average particle size. The fly ash particles are captured and settled by centrifugal motion through the static blade cyclone separator and the dust collection component. The dust collection component then collects the fly ash.
It effectively reduces fly ash particles in flue gas, improves the operating conditions of downstream equipment, increases ash collection efficiency, prevents equipment wear and ash accumulation blockage, and enhances the safety and economy of boilers.
Smart Images
Figure CN223691067U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of boiler dust collection, especially a boiler economizer flue gas outlet dust collection. BACKGROUND
[0002] The economizer is an important equipment in the large coal-fired boiler, which is installed at the lower part of the boiler tail flue for recovering the waste heat of the flue gas, reducing the flue gas exhaust temperature, and playing a role in saving energy and improving efficiency. A large amount of fly ash is generated in the coal-fired boiler. Under normal circumstances, only a small part of the fly ash is discharged from the bottom of the boiler, and most of the fly ash moves with the flue gas to the tail of the boiler. The existing economizer outlet hopper has a simple structure and collects fly ash by gravity settling. The dust collection range is narrow, the dust collection efficiency is low, and a large amount of fly ash is carried by the flue gas to the downstream of the boiler, which easily causes fly ash wear and ash blockage of denitration and air preheater equipment, affecting the safety and economy of the boiler. SUMMARY
[0003] The utility model aims to provide a boiler economizer outlet dust collection device to solve the above problems existing in the prior art.
[0004] Technical scheme: A boiler economizer outlet dust collection device comprises a shell with an inner cavity, a flue gas inlet at the top of the shell, and a flue gas outlet at the side of the shell.
[0005] A coupling dust collector is attached to the inner cavity of the shell, which divides the inner cavity of the shell into an upper cavity and a lower cavity below the upper cavity.
[0006] An acoustic wave agglomeration member is attached to each side of the shell, which is in communication with the upper cavity.
[0007] A dust collection member is arranged at the bottom of the shell, which is in communication with the lower cavity.
[0008] In one embodiment, the flue gas inlet is in communication with the upper cavity, and the flue gas outlet is in communication with the lower cavity.
[0009] In one embodiment, the acoustic wave agglomeration member comprises an acoustic wave diffusing part attached to each side of the shell, one end of which is in communication with the upper cavity.
[0010] And an acoustic wave sound generator is attached to the other end of the acoustic wave diffusing part.
[0011] In one embodiment, the acoustic wave diffusing part comprises a bugle.
[0012] In one embodiment, the bugle has a first opening at one end and a second opening at the other end.
[0013] The first opening of the horn is communicated with the upper cavity, and the second opening of the horn is attached to the sound wave sound generator.
[0014] In one embodiment, the horn gradually expands from the second opening to the first opening.
[0015] In one embodiment, the coupling dust collector comprises a structural frame attached to the shell, and a vane cyclone separation pipe attached to the structural frame.
[0016] In one embodiment, the structural frame comprises a support grid attached to the shell, the support grid is arranged in layers one above another in the shell, and a perforated plate attached to the support grid.
[0017] In one embodiment, the vane cyclone separation pipe is arranged in an array closely in the hole of the perforated plate.
[0018] In one embodiment, the vane cyclone separation pipe comprises a pipe body defining two open ends, the pipe body is attached to the hole of the perforated plate, and a vane arranged in the pipe body.
[0019] In one embodiment, the dust collecting member comprises a dust collecting port arranged at the bottom of the shell, and a dust collecting hopper attached to the dust collecting port, the dust collecting hopper and the lower cavity are communicated through the dust collecting port.
[0020] In one embodiment, the dust collecting hopper is located below the coupling dust collector.
[0021] In summary, the beneficial effects of the present application are:
[0022] 1. The boiler economizer dust collecting device of the present application forms a sound field in the upper cavity of the shell through the sound wave agglomeration member, so that the fine fly ash particles in the flue gas collide and agglomerate, the particle number concentration decreases, the average particle size increases, and the fly ash particles are easily captured, then the fly ash particles are thrown to the inner wall surface of the coupling dust collector by centrifugal motion generated by the coupling dust collector, and then settle in the dust collecting member for collection, which can effectively reduce the fly ash particles in the flue gas and improve the operating conditions of the downstream equipment.
[0023] 2. The boiler economizer dust collecting device of the present application is configured with a sound wave agglomeration member on each side of the shell, so that the sound field formed in the upper cavity of the shell has no dead angle, and the collision and agglomeration rate of fine fly ash particles in the flue gas can be improved.
[0024] 3. The boiler economizer dust collecting device of the present application closely arranges the vane cyclone separation pipe of the coupling dust collector in an array in the hole of the perforated plate, which can effectively ensure the efficiency of the vane cyclone separation pipe in capturing fly ash particles. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1This is a schematic diagram of an embodiment of a boiler economizer ash collection device;
[0026] Figure 2 yes Figure 1 Top view of the coupled dust collector of the boiler economizer ash collection device in the embodiment shown;
[0027] Figure 3 yes Figure 2 The cross-sectional view of the stationary blade cyclone separator of the coupled dust collector shown.
[0028] The attached figures are labeled as follows: 1. Shell; 2. Inner cavity; 3. Upper cavity; 4. Lower cavity; 5. Coupled dust collector; 6. Acoustic agglomeration component; 7. Flue gas inlet; 8. Flue gas outlet; 9. Dust collection port; 10. Dust collection hopper; 11. Support frame; 12. Orifice plate; 13. Still blade cyclone separator; 14. Blade. Detailed Implementation
[0029] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention. Example 1
[0030] like Figure 1 As shown, this embodiment discloses an ash collection device for an economizer in a megawatt generator set boiler. It includes a shell 1 with an inner cavity 2, a flue gas inlet 7 at the top of the shell 1, a flue gas outlet 8 on the side of the shell 1, a coupled dust collector 5 attached to the shell 1, which divides the inner cavity 2 of the shell 1 into an upper cavity 3 and a lower cavity 4 below the upper cavity 3. Acoustic agglomeration components 6 are attached to each side of the shell 1 and are connected to the upper cavity 3. A dust collection component is disposed at the bottom of the shell 1 and is connected to the lower cavity 4. The acoustic agglomeration components 6 create a sound field within the upper cavity 3 of the shell 1, causing fine fly ash particles in the flue gas to collide and agglomerate, reducing the particle number concentration and increasing the average particle size, making them easier to capture. Subsequently, the fly ash particles are centrifugally propelled by the coupled dust collector 5 and thrown towards the inner wall surface of the coupled dust collector 5, then settle into the dust collection component for collection. This effectively reduces fly ash particles in the flue gas and improves the operating conditions of downstream equipment.
[0031] like Figure 1As shown, the flue gas inlet 7 and the upper cavity 3 are communicated, the flue gas outlet 8 and the lower cavity 4 are communicated, the dust-containing flue gas is discharged from the flue gas inlet 7 into the upper cavity 3 of the shell 1, under the action of the acoustic field formed by the acoustic agglomeration component 6, the fly ash particles in the flue gas collide and agglomerate in the upper cavity 3 of the shell 1, and then the fly ash particles move to the lower cavity 4 of the shell 1, in the process, the fly ash particles are centrifuged by the coupling dust removal, the fly ash particles are thrown to the inner wall surface of the coupling dust collector 5, and then the fly ash particles are collected in the dust collecting component, and the purified flue gas is discharged from the flue gas outlet 8 of the shell 1.
[0032] As shown in Figure 1 , the acoustic agglomeration component 6 comprises an acoustic wave diffusing component attached to each side of the shell 1, one end of the acoustic wave diffusing component is communicated with the upper cavity 3, and the acoustic wave diffusing component is attached to the other end of the acoustic wave diffusing component. The acoustic wave diffusing component is arranged on each side of the shell 1, so that the acoustic field formed in the upper cavity 3 of the shell 1 has no dead angle, and the collision and agglomeration rate of fine fly ash particles in the flue gas can be improved.
[0033] As shown in Figure 1 , the acoustic wave diffusing component comprises a horn, one end of the horn has a first opening, and the other end of the horn has a second opening, wherein the first opening of the horn is communicated with the upper cavity 3, and the second opening of the horn is attached to the acoustic wave diffusing component. The acoustic wave diffusing component generates acoustic waves, which are radiated into the upper cavity 3 of the shell 1 through the horn, so that the acoustic field is formed in the upper cavity 3 of the shell 1.
[0034] As shown in Figure 1 , the horn gradually expands from the second opening to the first opening, that is, the whole horn is gradually expanded, the acoustic waves generated by the acoustic wave diffusing component are more effectively radiated into the upper cavity 3 of the shell 1, the sound pressure level in the upper cavity 3 of the shell 1 is improved, which is beneficial to improve the effect of the acoustic field formed in the upper cavity 3 of the shell 1, and the gradually expanded horn can play a transition role, reduce the reflection and loss of acoustic waves in the radiation process, and make the acoustic waves more effectively radiate into the upper cavity 3 of the shell 1.
[0035] As shown in Figure 2 , the coupling dust collector 5 comprises a structural frame attached to the shell 1, and a vane cyclone separation pipe 13 attached to the structural frame. After the fly ash particles collide and agglomerate, they move to the lower cavity 4 of the shell 1, and are centrifuged by the vane cyclone separation pipe 13 and the inner wall surface of the vane cyclone separation pipe 13, and then are collected in the dust collecting component.
[0036] As shown in Figure 2 , the structural frame comprises a support grid frame attached to the shell 1, and a hole plate 12 attached to the support grid frame. The support grid frame is arranged in layers in the shell 1, and the hole plate 12 is attached to the support grid frame. The support grid frame arranged in layers in the shell 1 can effectively ensure the stability of the installation of the vane cyclone separation pipe 13.
[0037] As shown in Figure 2As shown, the vane cyclone separation tubes 13 are closely arranged in an array within the holes of the orifice plate 12, which can effectively ensure the efficiency of the vane cyclone separation tubes 13 in capturing fly ash particles, and the number of the vane cyclone separation tubes 13 is 4300.
[0038] As shown in the drawings, Figure 3 The vane cyclone separation tube 13 includes a tube body defining two open ends, the tube body is attached to the hole of the orifice plate 12, and a vane 14 is arranged in the tube body, the fly ash particles are thrown to the inner wall surface of the tube body by the centrifugal motion of the vane 14, and then the fly ash particles are collected in the dust collecting member under the action of gravity.
[0039] As shown in the drawings, Figure 1 The dust collecting member includes a dust collecting port 9 arranged at the bottom of the shell 1, and a dust collecting hopper 10 attached to the dust collecting port 9, the dust collecting hopper 10 and the lower cavity 4 are communicated through the dust collecting port 9, and the dust collecting hopper 10 is used to collect the settled fly ash particles.
[0040] As shown in the drawings, Figure 1 The dust collecting hopper 10 is located below the coupled dust collector, so as to facilitate the collection of the settled fly ash particles.
[0041] The preferred embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the specific details in the above embodiments, and various equivalent transformations can be made to the technical solutions of the utility model within the technical concept range of the utility model, and these equivalent transformations all belong to the protection range of the utility model.
Claims
1. A soot collecting device at an outlet of an economizer of a boiler, characterized by, A housing having an inner cavity, the housing top having a flue gas inlet, the housing side having a flue gas outlet; A coupling dust collector attached inside the housing, the coupling dust collector separating the inner cavity of the housing into an upper cavity and a lower cavity located below the upper cavity; A sound wave agglomeration member attached to each side of the housing, the sound wave agglomeration member being in communication with the upper cavity; A dust collection member configured at the bottom of the housing, the dust collection member being in communication with the lower cavity.
2. A dust collecting device at the outlet of a boiler economizer according to claim 1, characterized in that, The sound wave agglomeration member includes a sound wave diffuser attached to each side of the housing, the sound wave diffuser being in communication with the upper cavity at one end; And a sound wave sound generator attached to the other end of the sound wave diffuser.
3. A dust collecting device at the outlet of a boiler economizer according to claim 2, characterized in that, The sound wave diffuser includes a horn.
4. A dust collecting device at the outlet of a boiler economizer according to claim 3, characterized in that, The horn has a first opening at one end and a second opening at the other end; Wherein the first opening of the horn is in communication with the upper cavity, and the second opening of the horn is attached to the sound wave sound generator.
5. A soot collecting device at the outlet of a boiler economizer according to claim 4, characterized in that The horn gradually expands in the direction from the second opening to the first opening.
6. A dust collecting device at the outlet of a boiler economizer according to claim 1, characterized in that The coupling dust collector includes a structural frame attached inside the housing, and a stationary vane cyclone separation tube attached to the structural frame.
7. A dust collecting device at the outlet of a boiler economizer according to claim 6, characterized in that The structural frame includes a support grid attached inside the housing, the support grid being arranged in layers stacked vertically inside the housing, and a perforated plate attached to the support grid.
8. A dust collecting device at the outlet of a boiler economizer according to claim 7, characterized in that, The stationary vane cyclone separation tubes are closely arranged in an array inside the holes of the perforated plate.
9. A dust collecting device at the outlet of a boiler economizer according to claim 6, characterized in that, The stationary vane cyclone separation tube includes a tube body defining two open ends, the tube body being attached to the hole of the perforated plate, and a vane configured inside the tube body.
10. The dust collecting device at the outlet of a boiler economizer according to claim 1, characterized in that, The dust collection member includes a dust collection port configured at the bottom of the housing, and a dust collection hopper attached to the dust collection port, the dust collection hopper being in communication with the lower cavity through the dust collection port.