CN218532157U - Dust accumulation prevention device for dust removal pipeline under variable working conditions - Google Patents
Dust accumulation prevention device for dust removal pipeline under variable working conditions Download PDFInfo
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- CN218532157U CN218532157U CN202221842758.6U CN202221842758U CN218532157U CN 218532157 U CN218532157 U CN 218532157U CN 202221842758 U CN202221842758 U CN 202221842758U CN 218532157 U CN218532157 U CN 218532157U
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Abstract
The application discloses a dust accumulation prevention device and method for a dust removal pipeline under a variable working condition, which relate to the technical field of gas dust removal pipe networks and comprise a plurality of dust removal branch pipelines, wherein each dust removal branch pipeline comprises a plurality of branch pipes which are connected in parallel and used for dust collection, a dust removal cover is arranged at the inlet end of each branch pipe, and a flowmeter and a flow regulating valve are arranged on each branch pipe; the main dust removal pipeline is formed by a plurality of pipelines with different pipe diameters; the dust collecting and discharging mechanism is connected with the main dust removing pipeline and is used for discharging dust; the regulating and controlling mechanism comprises a flow control assembly used for changing the cross section area of the main dust removing pipeline, the flow control assembly comprises a plurality of air bags capable of inflating and deflating, and the air bags are arranged on the inner wall of the main dust removing pipeline. This application can be according to the change of flow in the pipeline, the sectional area of adjustment pipeline ensures that pipeline internal flow velocity is greater than the minimum velocity of flow of design, when realizing that the fan is energy-conserving, ensures that the interior dust of pipeline does not take place the gathering.
Description
Technical Field
The utility model belongs to the technical field of gaseous dust removal pipe network technique and specifically relates to a dust deposition device is prevented to dust removal pipeline under variable working condition.
Background
The dust-free high-efficiency energy-saving environment-friendly energy-saving material is prepared by the processes of mining, smelting, forging, heat treatment, paint spraying, power generation and the like, a large amount of dust can be generated in the air, and various occupational diseases can be caused in the environment for a long time. At present, one method which is widely used and has a good effect is to arrange a dust hood at or near a dust source, utilize a fan to suck flue gas and dust into the hood, send the flue gas and the dust into a dust remover through an air pipe for purification, and discharge the flue gas and the dust into the atmosphere through the air pipe after reaching the emission standard. To the comparatively scattered occasion of dust removal point, need arrange many dust excluding hoods and concentrate dust treatment, the main pipeline of removing dust designs according to each dust removal point demand amount of wind maximum value, because each dust removal point demand changes great in the use, main dust removal pipeline flow change is also great, especially when the flow is lower, when main dust removal pipeline velocity of flow is less than the design minimum, the dust easily subsides in the pipeline, cause the pipe network to block up, if the fan does not consider flow change, operate with large-traffic all the time, then can cause energy loss.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide a dust-collecting prevention device for a dust removal pipeline under variable working conditions, which can adjust the cross-sectional area of the pipeline according to the change of the flow rate in the pipeline, ensure that the flow rate in the pipeline is greater than the designed minimum flow rate, and ensure that dust in the pipeline is not accumulated while achieving energy saving of a fan.
The application provides a pair of dust collecting device is prevented to dust removal pipeline under variable operating mode adopts following technical scheme:
a dust collection pipeline anti-dust deposition device under variable working conditions comprises a plurality of dust collection branch pipelines, wherein each dust collection branch pipeline comprises a plurality of branch pipes which are arranged in parallel and used for collecting dust, a dust removal cover is arranged at the inlet end of each branch pipe, and a flowmeter and a flow regulating valve are arranged on each branch pipe; the dust removal branch pipelines are arranged in parallel in the main dust removal pipeline, and the main dust removal pipeline is composed of pipelines with different pipe diameters; the dust collecting and discharging mechanism is connected with the main dust removing pipeline and is used for discharging dust; the regulating mechanism comprises a flow control assembly for changing the cross-sectional area of the main dust removal pipeline, the flow control assembly comprises a plurality of air bags capable of being inflated and deflated, and the air bags are arranged on the inner wall of the main dust removal pipeline.
Optionally, the regulating mechanism further comprises an air charging and discharging assembly connected with the air bag, and each pipeline connecting the air bag and the air charging and discharging assembly is provided with an electric control valve.
Optionally, the inflation and deflation assembly comprises a vacuum pump and a compressed air tank, and the inflation pipeline of the air bag is communicated with the vacuum pump and the compressed air tank.
Optionally, a plurality of fixed ends are arranged on the inner wall of the main dust removal pipeline, and the air bag is fixedly arranged on the fixed ends.
Optionally, a supporting grid plate is arranged at the position, located at the inlet of the pipeline with the same pipe diameter, of the main dust removal pipeline, and the air bags are arranged on two sides of the supporting grid plate.
Optionally, the length of the air bag close to the air inlet side in the axial direction of the pipeline is shorter than the length of the air bag at the other side of the support grid plate.
Optionally, the dust collecting and discharging mechanism comprises a bag-type dust collector, a fan and a discharging pipe.
Optionally, the pipe diameter of the main dust removal pipeline increases in a step shape along the airflow direction.
In summary, the present application includes at least one of the following advantages: according to the change of the gas flow in the pipeline, the air bag in the pipeline is inflated or deflated to change the flow of the pipeline, so that the flow velocity in the pipeline is ensured to be greater than the designed minimum flow velocity, and the dust in the pipeline is ensured not to be accumulated while the energy conservation of the fan is realized.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present application.
Figure 2 is a schematic view of the inflated condition of the air bag.
Fig. 3 is a schematic view of the air bag in the deflated state.
Fig. 4 is an enlarged view of a portion a in fig. 2.
Description of the reference numerals:
1. a dust removal branch pipeline; 11. a branch pipe; 12. a dust hood; 13. a flow meter; 14. a flow regulating valve; 2. a main dust removal pipeline; 21. a fixed end; 22. supporting the grid plate; 3. a dust collection and discharge mechanism; 31. a bag-type dust collector; 32. a fan; 33. a discharge pipe; 4. a flow control assembly; 41. an air bag; 42. an electrically controlled valve; 5. an air charging and discharging assembly; 51. a vacuum pump; 52. a compressed air tank; 53. an electric valve.
Detailed Description
The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application provides a dust collecting device is prevented to dust removal pipeline under the variable operating mode. Referring to fig. 1, a dust-collecting prevention device for a dust removal pipeline under a variable working condition comprises a dust removal branch pipeline 1, a main dust removal pipeline 2, a dust collection discharge mechanism 3 and a regulation and control mechanism, wherein the dust removal branch pipeline 1 is provided with two groups and is arranged on the main dust removal pipeline 2 in parallel, the dust removal branch pipeline 1 is formed by connecting a plurality of branch pipes 11 in parallel, in this embodiment, the branch pipes 11 are provided with four branch pipes, a dust removal cover 12 communicated with the atmosphere is installed at an air inlet end of each branch pipe 11, a flowmeter 13 is installed at the middle position of each branch pipe 11, and a flow control valve 14 is installed at the top end of each branch pipe 11.
The main dust removal pipeline 2 is composed of pipelines with different pipe diameters, the pipe diameter of the main dust removal pipeline 2 is increased in a step shape along the airflow direction, the dust collection and discharge mechanism 3 is connected to the outlet end of the main dust removal pipeline 2, the dust collection and discharge mechanism 3 comprises a bag-type dust remover 31, a fan 32 and a discharge pipe 33 which are sequentially connected, and the bag-type dust remover 31 is connected with the main dust removal pipeline 2.
Referring to fig. 1, 2 and 4, the regulating mechanism includes a flow control assembly 4 and an inflation and deflation assembly 5, the flow control assembly 4 is composed of a plurality of air bags 41, the air bags 41 can be inflated and deflated through the inflation and deflation assembly 5, the air bags 41 are fixed on the inner pipe walls above and at two sides of the main dust removal pipe 2, a plurality of fixed ends 21 are arranged on the pipe wall of the main dust removal pipe 2, and the air bags 41 are clamped with the fixed ends 21. Each air bag 41 is connected with a pipeline for inflating and deflating air, the other end of the pipeline for inflating and deflating air is connected with an inflation and deflation assembly 5, the inflation and deflation assembly 5 comprises a vacuum pump 51 and a compressed air tank 52, an electric control valve 42 is installed on the pipeline for inflating and deflating air of each air bag 41, electric valves 53 are installed at the outlet ends of the vacuum pump 51 and the compressed air tank 52, and the opening and closing of the vacuum pump 51 and the compressed air tank 52 are controlled through the two electric valves 53.
Referring to fig. 1, 2 and 3, the diameter of the main dedusting pipe 2 is determined by the maximum flue gas volume v of the collected dedusting cover 12, and by inquiring the specification, in order to prevent dust settlement and energy consumption loss, the flue gas flow rate of the main dedusting pipe 2 is generally 15 m/s-25 m/s, the dust characteristics are different, the flue gas flow rate is slightly different, the pipe diameter is designed according to the flow rate of 25m/s, and the diameter is designed according to the diameter size
The design is carried out, and the diameter of the main dust removal pipeline 2 is increased in a step shape along with the increase of the number of the dust removal covers 12 connected to the main pipeline. Because the dust excluding hood 12 that connects is many, the production technology to the amount of wind demand difference in time, cause the amount of wind on main dust removal pipeline 2 of a certain time period to be low on the contrary, according to calculating, main dust removal pipeline 2 velocity of flow
Even below 15m/s, causing dust particles to settle in the duct. To solve the problem, the flow rate in the pipe sections with different diameters is calculated according to the flow meter 13 on the dust removing branch pipe 1, if the flow rate is lower than the minimum limit value (generally 15 m/s), the corresponding electric control valve 42 on one air bag 41 of the corresponding pipe is opened, the electric valve 53 of the compressed air tank 52 pressurizes the air bag 41 through the pipe, when the pressure on the pipe reaches the preset value, the electric control valve 42 is closed, the air bag 41 in the corresponding area in the pipe is completely expanded, and at the moment, the cross section area in the pipe is calculated, and the pipe section is completely expandedThe area occupied by the air bag is reduced by the cross section area, the flow velocity in the pipe section is calculated by the flow passing through the pipe section, and if the flow velocity is still lower than the limited flow velocity, the air bag 41 is continuously opened until the flow velocity in the pipeline meets the requirement of a set value.
If the flow demand in the pipe section is increased, the flow rate in the pipeline exceeds the designed flow rate by 25m/s, at the moment, the electric valve 53 of the compressed air tank 52 is closed, the electric valve 53 on the vacuum pump 51 and one air bag 41 on the pipeline are simultaneously opened, the air bag 41 is vacuumized, the cross section area of the pipeline is increased, and if the flow rate does not meet the requirement, the air bag 41 is continuously extracted until the flow rate in the pipeline meets the requirement of a set value. After the air bag 41 is pressurized or evacuated, the electric control valve 42, the compressed air tank 52, and the corresponding electric valve 53 of the vacuum pump 51 are closed.
Referring to fig. 2 and 4, in order to ensure that the air bag 41 is in an inflated state, the cross section of the inlet bears pressure, and the fixed end 21 bears too much force, the supporting grid plate 22 is arranged inside the pipe section with the same diameter, the air bag 41 is fixedly installed on two sides of the supporting grid plate 22, after the air bag 41 is inflated, the volume expands, and the supporting grid plate 22 is filled by the air bag 41, so that the extrusion force applied to the fixed end 21 can be reduced, and the possibility that the air bag 41 falls off can be reduced.
Meanwhile, in order to reduce the possibility that the air bag 41 is impacted by the airflow and falls off, the length of the air bag 41 close to the air inlet direction along the axial direction of the pipeline is shorter than the length of the air bag 41 on the other side of the supporting grid plate 22, so that the air pressure on the air bag 41 can be reduced, and the falling off possibility of the air bag 41 can be reduced.
The implementation principle of the dust-deposition prevention device for the dust removal pipeline under the variable working condition is as follows: the dust collection and discharge mechanism 3 is started, the dust removal cover 12 absorbs dust in air through the fan 32 and the bag-type dust remover 31, the flow regulating valve 14 regulates the dust collection speed of the dust removal cover 12 through the flowmeter 13, the electric valve 53 at the outlet end of the compressed air tank 52 or the vacuum pump 51 is opened according to the flow in the pipeline, the electric control valve 42 on the air bag 41 needing to be inflated or deflated is opened, part of the air bag 41 is inflated or deflated, the cross section area of the pipeline is increased or decreased until the flow rate in the pipeline meets the requirement of a set value, and the electric control valve 42 and the electric valve 53 are closed.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (8)
1. The utility model provides a dust collecting device is prevented to dust removal pipeline under the variable operating mode which characterized in that includes:
the dust removal system comprises a plurality of dust removal branch pipelines (1), wherein each dust removal branch pipeline (1) comprises a plurality of branch pipes (11) which are connected in parallel and used for dust collection, a dust removal cover (12) is arranged at the inlet end of each branch pipe (11), and a flow meter (13) and a flow regulating valve (14) are arranged on each branch pipe (11);
the dust removal branch pipelines (1) are arranged in the main dust removal pipeline (2) in parallel, and the main dust removal pipeline (2) is composed of pipelines with different pipe diameters;
the dust collecting and discharging mechanism (3) is connected with the main dust removing pipeline (2) and is used for discharging dust;
the regulating mechanism comprises a flow control assembly (4) used for changing the cross section area of the main dust removal pipeline (2), the flow control assembly (4) comprises a plurality of air bags (41) capable of being inflated and deflated, and the air bags (41) are arranged on the inner wall of the main dust removal pipeline (2).
2. The dust collecting device for the dust removing pipeline under the variable working condition of claim 1 is characterized in that: the regulating mechanism further comprises an air charging and discharging assembly (5) connected with the air bags (41), and a pipeline connecting each air bag (41) with the air charging and discharging assembly (5) is provided with a motor-driven control valve (42).
3. The dust collecting device for the dust removing pipeline under the variable working condition of claim 2 is characterized in that: the inflation and deflation assembly (5) comprises a vacuum pump (51) and a compressed air tank (52), and the inflation pipeline of the air bag (41) is communicated with the vacuum pump (51) and the compressed air tank (52).
4. The dust collecting device for the dust removing pipeline under the variable working condition of claim 3 is characterized in that: the inner wall of the main dust removal pipeline (2) is provided with a plurality of fixed ends (21), and the air bag (41) is fixedly arranged on the fixed ends (21).
5. The dust collecting device for the dust removing pipeline under the variable working condition according to claim 4, is characterized in that: the main dust removal pipeline (2) is positioned at the inlet of the pipeline with the same pipe diameter and is provided with a supporting grid plate (22), and the air bags (41) are arranged on two sides of the supporting grid plate (22).
6. The dust collecting device for the dust removing pipeline under the variable working condition of claim 5 is characterized in that: the length of the air bag (41) close to the air inlet side along the axial direction of the pipeline is shorter than that of the air bag (41) at the other side of the support grid plate (22).
7. The dust collecting device for the dust removing pipeline under the variable working condition of claim 1 is characterized in that: the dust collection and discharge mechanism (3) comprises a bag-type dust collector (31), a fan (32) and a discharge pipe (33).
8. The dust collecting device for the dust removing pipeline under the variable working condition of claim 1 is characterized in that: the pipe diameter of the main dust removal pipeline (2) is increased in a step shape along the airflow direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221842758.6U CN218532157U (en) | 2022-07-18 | 2022-07-18 | Dust accumulation prevention device for dust removal pipeline under variable working conditions |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221842758.6U CN218532157U (en) | 2022-07-18 | 2022-07-18 | Dust accumulation prevention device for dust removal pipeline under variable working conditions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115055475A (en) * | 2022-07-18 | 2022-09-16 | 中冶赛迪技术研究中心有限公司 | Dust accumulation prevention device and method for dust removal pipeline under variable working conditions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115055475A (en) * | 2022-07-18 | 2022-09-16 | 中冶赛迪技术研究中心有限公司 | Dust accumulation prevention device and method for dust removal pipeline under variable working conditions |
| CN115055475B (en) * | 2022-07-18 | 2024-07-23 | 中冶赛迪技术研究中心有限公司 | Dust accumulation preventing device and method for dust removal pipeline under variable working conditions |
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