CN102061352B - Air flow distribution plate at inlet of electrostatic dust collector - Google Patents
Air flow distribution plate at inlet of electrostatic dust collector Download PDFInfo
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- CN102061352B CN102061352B CN2010105890478A CN201010589047A CN102061352B CN 102061352 B CN102061352 B CN 102061352B CN 2010105890478 A CN2010105890478 A CN 2010105890478A CN 201010589047 A CN201010589047 A CN 201010589047A CN 102061352 B CN102061352 B CN 102061352B
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- grid distributor
- air flow
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- airflow
- distribution board
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Abstract
The invention provides an air flow distribution plate at an inlet of an electrostatic dust collector, relating to the electrostatic dust collector used in a dry method dust collection technology of a rotation furnace gas. The air flow distribution plate is provided with a through hole and arranged in a gradually expended horn mouth at the inlet of electrostatic dust collector. The air flow distribution plate is characterized in that the air flow distribution plate is of a dish shape and is spliced by at least regions; and further, the aperture ratio of the air flow distribution plate is gradually increased from the centre to the outside. The air flow distribution plate has the beneficial effects that through arranging the dish-shaped air flow distribution plate, the flow velocity and flow quantity of the air at the central region are reduced by the air flow distribution plate at the reducing nipple position of the inlet of the electrostatic dust collector, and the flow velocity and flow quantity of the air at the fringe region are increased, thereby effectively inhibiting vortex, so that the air flow entering the electrostatic dust collector is of a plunger shape and evenly distributed, thereby reducing the explosion time of the electrostatic dust collector and improving the dust-collecting effect; and the aperture ratio of the air flow distribution plate is increased from the centre to the outside, thereby further improving flow equalizing effect.
Description
Technical field
The present invention relates to the electrostatic precipitator used in the converter gas dry method dust collecting process, refer to a kind of electrostatic precipitator inlet air flow grid distributor particularly.
Background technology
The converter gas dry method dedusting technology is because its advantage at aspects such as energy-conservation, water saving, environmental protection, and is widely used, and wherein, electrostatic precipitator is the core of whole dust-removal system.Since can the cycle in the operational characteristic of converter steelmaking, electrostatic precipitator pass through coal gas and air.At the alternating phases of coal gas and air, can blast in the time of in gas mixture is in the limits of explosion scope.The generation and the blast scale that how to reduce gas explosion in the electrostatic precipitator are the keys of converter gas dry-dedusting system safe and stable operation.
A kind of effective ways that reduce the venting of dust explosion probability are control air-flows through electrostatic precipitator, make it be piston-shaped, reducing the transition section length of coal gas and air, thus the blast that minimizing causes because of coal gas and Air mixing.Because the entrance of electrostatic precipitator is bigger variable cross-section district, so the multilayer airflow-distribution board need be set to reduce eddy current at the entrance of electrostatic precipitator.The airflow-distribution board that uses at present is the flat board that has square hole or X-shaped hole, and its current-sharing effect is not satisfactory.
Summary of the invention
Technical problem to be solved by this invention just provides a kind of electrostatic precipitator inlet air flow grid distributor, and can significantly reduce the eddy current of electrostatic precipitator entrance and form piston-shaped air-flow preferably, thus the venting of dust explosion number of times of minimizing electrostatic precipitator.
For solving the problems of the technologies described above; A kind of electrostatic precipitator inlet air flow grid distributor provided by the invention; Have through hole and be arranged in the hydraucone of electrostatic precipitator ingress flaring, its special feature is: said airflow-distribution board is dish, is spliced by at least two zones.
In the technique scheme, the percentage of open area of said airflow-distribution board therefrom mind-set increases outward gradually.
In the technique scheme, said airflow-distribution board therefrom mind-set is spliced by grid distributor I district, grid distributor II district and grid distributor III district outward successively.
In the technique scheme, the per-cent that each regional area of said airflow-distribution board accounts for whole airflow-distribution board area is: grid distributor I district accounts for 21～25%, and grid distributor II district accounts for 11～13%, and grid distributor III district accounts for 62～68%.
Further, the per-cent that each regional area of said airflow-distribution board accounts for whole airflow-distribution board area is: grid distributor I district accounts for 21%, and grid distributor II district accounts for 11%, and grid distributor III district accounts for 68%.
In the technique scheme, the percentage of open area in said grid distributor I district is 45～50%, and the percentage of open area in said grid distributor II district is 50～55%, and the percentage of open area in said grid distributor III district is 55～60%.
Further, the percentage of open area in said grid distributor I district is 50%, and the percentage of open area in said grid distributor II district is 55%, and the percentage of open area in said grid distributor III district is 60%.
In the technique scheme, said grid distributor I district is perpendicular to the axis of airflow-distribution board, and the angle of said grid distributor II district and airflow-distribution board axis is 48～53 °, and the angle of said grid distributor III district and airflow-distribution board axis is 76-81 °.
Further, the angle of said grid distributor II district and airflow-distribution board axis is 51 °, and the angle of said grid distributor III district and airflow-distribution board axis is 79 °.
In the technique scheme, said airflow-distribution board is the carbon steel sheet material, and thickness is 4～6mm.
Beneficial effect of the present invention is: through the airflow-distribution board of dish is set; Make that at the reducing place of electrostatic precipitator inlet airflow-distribution board reduces the flow velocity of region intermediate gas and flow, and the flow velocity of fringe region gas and flow increase; Effectively suppressed eddy current; Make the air-flow that gets into electrostatic precipitator be piston-shaped and be evenly distributed, reduced the venting of dust explosion number of times of electrostatic precipitator, strengthened dust removing effects; The percentage of open area of airflow-distribution board therefrom mind-set increases outward gradually, has further strengthened the current-sharing effect.
Description of drawings
Fig. 1 is the scheme of installation of one embodiment of the invention;
Fig. 2 is the structural representation of an electrostatic precipitator inlet air flow grid distributor among Fig. 1;
Fig. 3 is that the A of Fig. 2 is to view;
Among the figure, 1-electrostatic precipitator body, 2-airflow-distribution board (wherein 2.1-grid distributor I district, 2.2-grid distributor II district, 2.3-grid distributor III district).
Embodiment
Below in conjunction with accompanying drawing a specific embodiment of the present invention is done further to describe in detail:
To shown in Figure 3, is that 110 ° a electrostatic precipitator be example with ingress hydraucone subtended angle like Fig. 1, and a kind of electrostatic precipitator inlet air flow grid distributor 2 of the present invention is dish, is processed by the carbon steel sheet that 6mm is thick, and it has square through hole.Airflow-distribution board 2 therefrom mind-set is spliced by grid distributor I district 2.1, grid distributor II district 2.2 and grid distributor III district 2.3 outward successively.Wherein: the area in grid distributor I district 2.1 accounts for 21% of whole airflow-distribution board 2 areas, and it is perpendicular to the axis of airflow-distribution board 2, and its percentage of open area is 50%; The area in grid distributor II district 2.2 accounts for 11% of whole airflow-distribution board 2 areas, and the angle of it and airflow-distribution board 2 axis is 51 °, and its percentage of open area is 55%; The area in grid distributor III district 2.3 accounts for 68% of whole airflow-distribution board 2 areas, and the angle of it and airflow-distribution board 2 axis is 79 °, and its percentage of open area is 60%.In the practical application, in the hydraucone of whole electrostatic precipitator body 1, at interval three to four airflow-distribution boards 2 are set and get final product, and fall to adhering to the dust on the airflow-distribution board 2, to keep its current-sharing effect through the earthquake of rapping apparatus periodicity.
This device passes through to adopt the therefrom outer disc structure that increases gradually of mind-set of percentage of open area, and stepped splicing, has reached the flow velocity and the flow that reduce airflow-distribution board 2 region intermediate gases; Increase the effect of the flow velocity and the flow of fringe region gas simultaneously; Make that the air-flow that gets into electrostatic precipitator is a piston-shaped, thereby air-flow is evenly distributed, and has reduced the venting of dust explosion number of times of electrostatic precipitator; Also make dust separating better effects if, help safe, the efficient operation of electrostatic precipitator.The results of numerical simulation shows; At the electrostatic precipitator inlet velocity is under the condition of 15m/s, through 1m section part behind three layers of airflow-distribution board, the σ of the airflow-distribution board of conventional flat template=0.25～0.28; And after using the airflow-distribution board of present embodiment, σ≤0.15.The RMS standard of the U.S. is adopted in the calculating of wherein, measuring the relative root-mean-square deviation σ of section velocity field:
In the formula, n is the measuring point number of test section, and a common test section will be laid 64 above measuring points at least; v
iBe the flow velocity of i measuring point, unit is m/s;
For measuring the mean flow rate of section, unit is m/s.
Protection scope of the present invention is not limited to the foregoing description.Obviously, those skilled in the art can carry out various changes and distortion and do not depart from the scope of the present invention and spirit the present invention.For example: according to the bell-mouthed specification in electrostatic precipitator ingress; The per-cent that airflow-distribution board 2 each regional area account for whole airflow-distribution board area is: grid distributor I district 2.1 accounts for 21%～25%, grid distributor II district 2.2 accounts for 11%～13%, grid distributor III district 2.3 accounts for 62～68%; Perhaps the percentage of open area in grid distributor I district 2.1 is 45～50%, the percentage of open area in grid distributor II district 2.2 is 50～55%, the percentage of open area in grid distributor III district 2.3 is 55～60%, and perhaps the angle of grid distributor II district 2.2 and airflow-distribution board 2 axis is that to be 76-81 ° all be feasible for the angle of 48～53 °, grid distributor III district 2.3 and airflow-distribution board 2 axis; The carbon steel sheet thickness that is used to make airflow-distribution board 2 is opened X-shaped hole or other shape, airflow-distribution board 2 and is spliced etc. by two or four zones and also can both reaches technique effect of the present invention at 4～6mm, on it.If these changes and distortion belong in the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and is out of shape interior.
Claims (9)
1. an electrostatic precipitator inlet air flow grid distributor (2) has through hole and is arranged in the hydraucone of electrostatic precipitator ingress flaring, and it is characterized in that: said airflow-distribution board (2) is dish, is spliced by at least two zones; The percentage of open area of said airflow-distribution board (2) therefrom mind-set increases outward gradually.
2. electrostatic precipitator inlet air flow grid distributor according to claim 1 (2) is characterized in that: said airflow-distribution board (2) therefrom mind-set is spliced by grid distributor I district (2.1), grid distributor II district (2.2) and grid distributor III district (2.3) outward successively.
3. electrostatic precipitator inlet air flow grid distributor according to claim 2 (2); It is characterized in that: the per-cent that each regional area of said airflow-distribution board (2) accounts for whole airflow-distribution board (2) area is: grid distributor I district (2.1) accounts for 21～25%; Grid distributor II district (2.2) accounts for 11～13%, and grid distributor III district (2.3) accounts for 62～68%.
4. electrostatic precipitator inlet air flow grid distributor according to claim 3 (2); It is characterized in that: the per-cent that each regional area of said airflow-distribution board (2) accounts for whole airflow-distribution board (2) area is: grid distributor I district (2.1) accounts for 21%; Grid distributor II district (2.2) accounts for 11%, and grid distributor III district (2.3) accounts for 68%.
5. electrostatic precipitator inlet air flow grid distributor according to claim 2 (2); It is characterized in that: the percentage of open area in said grid distributor I district (2.1) is 45～50%; The percentage of open area in said grid distributor II district (2.2) is 50～55%, and the percentage of open area in said grid distributor III district (2.3) is 55～60%.
6. electrostatic precipitator inlet air flow grid distributor according to claim 5 (2); It is characterized in that: the percentage of open area in said grid distributor I district (2.1) is 50%; The percentage of open area in said grid distributor II district (2.2) is 55%, and the percentage of open area in said grid distributor III district (2.3) is 60%.
7. electrostatic precipitator inlet air flow grid distributor according to claim 2 (2); It is characterized in that: said grid distributor I district (2.1) is perpendicular to the axis of airflow-distribution board (2); Said grid distributor II district (2.2) is 48～53 ° with the angle of airflow-distribution board (2) axis, and said grid distributor III district (2.3) is 76-81 ° with the angle of airflow-distribution board (2) axis.
8. electrostatic precipitator inlet air flow grid distributor according to claim 7 (2); It is characterized in that: said grid distributor II district (2.2) is 51 ° with the angle of airflow-distribution board (2) axis, and said grid distributor III district (2.3) is 79 ° with the angle of airflow-distribution board (2) axis.
9. electrostatic precipitator inlet air flow grid distributor according to claim 1 (2) is characterized in that: it is the carbon steel sheet material, and thickness is 4～6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105890478A CN102061352B (en) | 2010-12-15 | 2010-12-15 | Air flow distribution plate at inlet of electrostatic dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105890478A CN102061352B (en) | 2010-12-15 | 2010-12-15 | Air flow distribution plate at inlet of electrostatic dust collector |
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| Publication Number | Publication Date |
|---|---|
| CN102061352A CN102061352A (en) | 2011-05-18 |
| CN102061352B true CN102061352B (en) | 2012-07-25 |
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| CN2010105890478A Expired - Fee Related CN102061352B (en) | 2010-12-15 | 2010-12-15 | Air flow distribution plate at inlet of electrostatic dust collector |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498971B (en) * | 2016-01-06 | 2018-02-09 | 上海超清环保科技有限公司 | Air flow method system applied to wet cottrell |
| CN105536415B (en) * | 2016-02-02 | 2018-03-02 | 南阳中天防爆电气有限公司 | Dust collecting for explosion hazard area |
| CN107042046B (en) * | 2017-02-09 | 2024-04-05 | 河北宏达环境工程有限公司 | Air flow distribution device of electric bag dust collector |
| CN108993772A (en) * | 2018-07-20 | 2018-12-14 | 江苏安纳泰环保科技有限公司 | A kind of organic exhaust gas wet cottrell |
| CN111729499A (en) * | 2020-07-28 | 2020-10-02 | 中国华电科工集团有限公司 | High-strength air flow uniform distribution plate and desulfurizing tower |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2671688Y (en) * | 2003-09-16 | 2005-01-19 | 陈国榘 | Front combined electrid dust removing and air flow even distribution smoke box |
| CN2814168Y (en) * | 2005-05-19 | 2006-09-06 | 国电环境保护研究所 | Low-pressure pluse bag dust cleaner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201962312U (en) * | 2010-12-15 | 2011-09-07 | 中冶南方工程技术有限公司 | Air current distribution plate at inlet of electrostatic dust collector |
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2010
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2671688Y (en) * | 2003-09-16 | 2005-01-19 | 陈国榘 | Front combined electrid dust removing and air flow even distribution smoke box |
| CN2814168Y (en) * | 2005-05-19 | 2006-09-06 | 国电环境保护研究所 | Low-pressure pluse bag dust cleaner |
Non-Patent Citations (1)
| Title |
|---|
| 王冠.脉冲袋式除尘器进气口导流板形式的试验研究.《工程技术》.2007,第71-74页. * |
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| CN102061352A (en) | 2011-05-18 |
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Granted publication date: 20120725 Termination date: 20131215 |