CN110788104A - Side-draft air-equalizing cover for ventilation and dust removal and design method thereof - Google Patents
Side-draft air-equalizing cover for ventilation and dust removal and design method thereof Download PDFInfo
- Publication number
- CN110788104A CN110788104A CN201910588678.9A CN201910588678A CN110788104A CN 110788104 A CN110788104 A CN 110788104A CN 201910588678 A CN201910588678 A CN 201910588678A CN 110788104 A CN110788104 A CN 110788104A
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- air
- equalizing
- box body
- ventilation
- air suction
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- 239000000428 dust Substances 0.000 title claims abstract description 38
- 238000013461 design Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000009423 ventilation Methods 0.000 title claims abstract description 14
- 238000003466 welding Methods 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000009970 fire resistant effect Effects 0.000 claims description 3
- 230000014509 gene expression Effects 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 238000009826 distribution Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a side-draft uniform wind hood for ventilation and dust removal and a design method thereof, wherein the side-draft uniform wind hood comprises the following steps: the utility model discloses a dust collector, including wind box, the equal wind baffle of wind, air inlet, flange, the equal wind baffle is located the equal wind box inside and through modes such as welding, bonding and equal wind box zonulae occludens, air inlet unilateral or two side settings are at the equal wind box lateral wall, are used for evenly inhaling dirty gas, flange connect with equal wind box rear portion, be used for connecting outside fan and dust remover. The invention overcomes the defect that the traditional side suction hood can only suck air at the rear part, realizes the design of side air outlet of the side suction hood, and can achieve the purpose of side suction when the installation of the rear part space of the suction hood is limited.
Description
Technical Field
The invention relates to the technical field of dust removal, in particular to a dust removal side-suction air equalizing hood and a design method thereof.
Background
In recent years, with the rapid development of economy, dust-containing pollutants discharged from metallurgical steelmaking electric furnaces and raw coal-fired boilers cause great harm to the surrounding environment, and it is important to remove particles in dust-containing gas so as to reduce air pollution. In the prior art, a roof suction hood, a movable roof suction hood and the like are generally adopted to capture dust-containing gas, and a dust remover is adopted to collect particles. The efficiency with which the suction hood collects dust-laden gases is an important factor in this connection. The existing air suction hood is of a rear suction type in order to ensure that all places of the hood body can generate negative pressure and have the maximum suction capacity. The negative pressure air suction hood provided by the publication No. 201410330251.6 is a hollow hood with the upper end gradually changed into a circular truncated cone and the lower end gradually changed into a square shape, an upper spherical hole plate and a lower spherical hole plate combining structure are arranged in the central area inside the air suction hood and fixed on the inner wall of the air suction hood through two wing-shaped structures, and a connecting pipeline of the air suction hood is of a suction type with the rear part of the circular truncated cone at the upper end. Also, as in the bobbin set dust collector disclosed in publication No. cn201210565277.x, the elongated dust collecting cover is also designed to be of a rear suction type according to a conventional dust collector structure.
In the case of the rear suction type suction hood, the rear space required for the suction hood is large in terms of installation of the suction hood, but when the rear space is limited, the suction hood cannot be installed due to the hydrodynamic design of the suction hood itself.
Disclosure of Invention
In order to solve the technical problem, the invention provides a side-draft uniform air hood for ventilation and dust removal and a design method thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the invention provides a side-suction air-equalizing cover for ventilation and dust removal, which comprises: the air distribution box comprises an air distribution box body, an air distribution baffle, an air suction opening and a connecting flange, and is characterized in that the air distribution baffle is located inside the air distribution box body and is tightly connected with the air distribution box body in a welding mode, a bonding mode and the like, the air suction opening is arranged on the side wall of the air distribution box body on one side or two sides and used for uniformly sucking dusty gas, and the connecting flange is connected with the rear portion of the air distribution box body and used for connecting an external fan and a dust remover.
The wind equalizing box body and the wind equalizing baffle are made of steel plates, fire-resistant heat-insulating plates or copper plates.
The wind-equalizing baffle is a vertical flat plate, the installation starts from the long side of the wind-equalizing box, and the wind-equalizing baffle or the extension lines are equally divided into two sides of the wind-equalizing box according to the number of the wind-equalizing baffles.
The number of the air suction openings can be 1-2, and the air suction openings are arranged on one side or two sides of the air equalizing box body.
The air suction inlet is provided with air-equalizing shutters or slits.
When the number of the air suction openings is 1, determining an included angle α between two sides of the air equalizing box body, the length L of the air suction openings and the number N of the air equalizing baffles by using the following relational expressions:
in the formula:
vxdesigning the wind speed for a sewage discharge point, and taking 0.2-0.3 m/s;
vgtaking 15-20 m/s as the flow velocity in the pipeline;
h is the height of the air suction opening, and is determined according to the mountable height, and the reasonable value is 0.2-1 m;
x is the vertical distance (not more than 7 times H) from the stain discharge point to the air suction opening, and is meter;
q is the exhaust air volume (dust production), cubic meter per second;
the horizontal projection lengths of the wind-equalizing baffle are L1/(N +1), L2/(N +1) … … L N/(N + 1).
The height of the air equalizing box body is 1.1-1.2 times of the height of the air suction opening, and the width of the short side edge is 0.6-1.5 times of the height of the air suction opening.
When the number of the air suction openings is 2, the air discharge amount (dust production amount) Q in the design method is 1/2, and the calculation is carried out according to the two single-side air suction openings.
The external residual pressure matched with the external fan meets the resistance requirement.
Compared with the prior art, the side-draft air-equalizing cover has the advantages that the pipeline connection mode of the side-draft air-equalizing cover is a side-draft type and the method for designing the side-draft air-equalizing cover greatly reduces the rear space, and the side-draft air-equalizing cover has stable air flow and high air draft efficiency compared with the existing exhaust cover.
On the basis of the technical scheme, the following improvements can be made:
as a preferred scheme, the air equalizing baffle can be connected with the air suction opening after being bent so as to avoid mixing of dust-containing gases in different flow passages.
Drawings
Fig. 1 is a three-dimensional schematic view of a side-draft air-equalizing cover for ventilation and dust removal according to the present invention.
Fig. 2 is a sectional view of a side-suction air-equalizing cover for ventilation and dust removal according to the present invention.
FIG. 3 is a side view of a side-suction wind-equalizing cover for ventilation and dust removal according to the present invention.
The wind equalizing box comprises a wind equalizing box body 1, a wind equalizing baffle 2, an air suction opening 3 and a connecting flange 4.
Detailed Description
The preferred embodiments of the present invention will be described in detail with reference to fig. 1, 2 and 3.
To achieve the object of the present invention, as shown in fig. 1, in one embodiment of the present invention, there is provided a side suction fan cover for ventilating and removing dust, comprising: the wind equalizing box comprises a wind equalizing box body 1, a wind equalizing baffle plate 2, an air suction opening 3 and a connecting flange 4, wherein the wind equalizing baffle plate 2 is positioned inside the wind equalizing box body and is tightly connected with the wind equalizing box body through welding, bonding and other modes, the air suction opening 3 is arranged on the side wall of the wind equalizing box body on one side or on two sides and is used for uniformly sucking dusty gas, and the connecting flange 3 is connected with the rear part of the wind equalizing box body 1 and is used for connecting an external fan and a dust remover.
The air equalizing box body 1 and the air equalizing baffle plate 2 are made of steel plates, fire-resistant heat-insulating plates or copper plates.
The air equalizing baffle 2 is a vertical flat plate, is installed from the long side of the air equalizing box, and equally divides the two sides of the air equalizing box body 1 according to the number of the air equalizing baffle 2 or the extension lines.
The number of the air suction openings 3 can be 1-2, and the air suction openings are arranged on one side or two sides of the air equalizing box body.
The air suction opening 3 is provided with air-equalizing shutters or slits.
The number of the air suction openings 3 is 1, and the included angle α between two sides of the air equalizing box body 1, the length L of the air suction openings 3 and the number N of the air equalizing baffles 2 are determined by using the following relational expressions:
in the formula:
vxdesigning the wind speed for a sewage discharge point, and taking 0.2-0.3 m/s;
vgtaking 15-20 m/s as the flow velocity in the pipeline;
h is the height of the air suction opening, and is determined according to the mountable height, and the reasonable value is 0.2-1 m;
the vertical distance (not more than 7 times H) from the x rows of the stains to the air suction inlet is meter;
q is the exhaust air volume (dust production), cubic meter per second;
the horizontal projection lengths of the wind-equalizing baffle 2 are L1/(N +1), L2/(N +1) … … L N/(N + 1).
The height of the air equalizing box body 1 is 1.1-1.2 times of the height of the air suction opening, and the width of the short side edge is 0.6-1.5 times of the height of the air suction opening.
The external residual pressure matched with the external fan meets the resistance requirement.
The idea of the invention is illustrated by taking the design of a side-suction uniform hood for dust-containing gas with the emission of 30 cubic meters per second and side suction of 1.5 meters.
The number of the suction openings is 1, the height of the suction openings is 0.3 m, the design wind speed of a pollution discharge point is 0.2 m/s, the flow speed in a design pipeline is 15 m/s, and at the moment:
the horizontal projection lengths of the wind-equalizing baffle 2 are respectively 0.94 meter, 1.88 meter and 2.82 meter.
The height of the air equalizing box body 1 is 1.1 times of the height of the air suction opening, and the width of the short side edge is 1 time of the height of the air suction opening. And calculating the resistance of the side draft fan by a computational fluid mechanics method, and selecting a proper external fan to finally obtain the relevant processing parameters of the side draft fan cover used under the working condition.
In order to further optimize the implementation effect of the present invention, in another embodiment of the present invention, based on the above, when the dust-containing gas is fully distributed in the space, and the number of the air suction ports 3 can be set to 2, the air discharge amount (dust generation amount) Q is 1/2, and is calculated according to the two single-side air suction ports.
In order to further optimize the implementation effect of the invention, in another embodiment of the invention, on the basis of the foregoing, a plurality of dust-removing side air-suction equalizing hoods can be horizontally or vertically arranged to meet the dust-removing requirement of the whole space.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. A side-draught air-equalizing cover for ventilation and dust removal comprises: the wind equalizing box comprises an air equalizing box body (1), an air equalizing baffle (2), an air suction opening (3) and a connecting flange (4), and is characterized in that the air equalizing baffle (2) is located inside the air equalizing box body (1) and is tightly connected with the air equalizing box body through welding, bonding and other modes, the air suction opening (3) is arranged on the side wall of the air equalizing box body on one side or two sides and used for uniformly sucking dusty gas, and the connecting flange (3) is connected with the rear part of the air equalizing box body (1) and used for connecting an external fan and a dust remover.
2. The side-draft air-equalizing cover for ventilation and dust removal according to claim 1, wherein the air-equalizing box body (1) and the air-equalizing baffle (2) are made of steel plates, fire-resistant heat-insulating plates or copper plates.
3. The side-draft air-equalizing cover for ventilation and dust removal according to claim 1, wherein the air-equalizing baffle (2) is a vertical flat plate, is installed to start from the long side of the air-equalizing box, and is itself or extended to equally divide the two sides of the air-equalizing box body (1) according to the number of the air-equalizing baffles (2).
4. The side-draft air-equalizing cover for ventilation and dust removal according to claim 1, wherein the number of the air suction openings (3) is 1-2, and the side-draft air-equalizing cover is arranged on one side or two sides of the air-equalizing box body.
5. The side-draft air-equalizing cover for ventilation and dust removal according to claim 1, wherein air-equalizing louvers or slits are provided on the air inlet (3).
6. The design method of the side-draft air-equalizing cover for ventilation and dust removal according to claim 1, wherein when the number of the air suction ports (3) is 1, the included angle α between two sides of the air-equalizing box body (1), the length L of the air suction ports (3) and the number N of the air-equalizing baffles (2) are determined by using the following relational expressions:
in the formula:
vxis a sewage discharge pointDesigning wind speed, and taking 0.2-0.3 m/s;
vgtaking 15-20 m/s as the flow velocity in the pipeline;
h is the height of the air suction opening, and is determined according to the mountable height, and the reasonable value is 0.2-1 m;
the vertical distance (not more than 7 times H) from the x rows of the stains to the air suction inlet is meter;
q is the exhaust air volume (dust production) in cubic meters per second.
7. The design method according to claim 6, characterized in that the horizontal projection lengths of the wind-equalizing baffle (2) are L x 1/(N +1), L x 2/(N +1) … … L N/(N + 1).
8. The design method according to claim 6, wherein the height of the box body (1) is 1.1-1.2 times of the height of the air suction inlet, and the width of the short side is 0.6-1.5 times of the height of the air suction inlet.
9. The design method according to claim 6, wherein when the number of the air suction ports (3) is 2, the exhaust air volume (dust production) Q in the design method is 1/2 and is calculated according to two single-side air suction ports.
10. The design method according to claim 6, wherein the extra-engine pressure matched to the external fan is required to meet the resistance requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910588678.9A CN110788104A (en) | 2019-07-02 | 2019-07-02 | Side-draft air-equalizing cover for ventilation and dust removal and design method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910588678.9A CN110788104A (en) | 2019-07-02 | 2019-07-02 | Side-draft air-equalizing cover for ventilation and dust removal and design method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN110788104A true CN110788104A (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910588678.9A Pending CN110788104A (en) | 2019-07-02 | 2019-07-02 | Side-draft air-equalizing cover for ventilation and dust removal and design method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0577440A1 (en) * | 1992-07-03 | 1994-01-05 | SOLOMAT S.A. Société dite: | Flame-cutting machine |
| KR20050064997A (en) * | 2003-12-24 | 2005-06-29 | 재단법인 포항산업과학연구원 | Hood device of an electro-galvanizing line |
| CN201125277Y (en) * | 2007-11-13 | 2008-10-01 | 中船第九设计研究院工程有限公司 | Side draught type electroplating groove air exhaust cover |
| CN102268500A (en) * | 2011-08-02 | 2011-12-07 | 姚立猛 | Air suction hood device |
| CN106824964A (en) * | 2017-03-20 | 2017-06-13 | 威尔登环保设备（长沙）有限公司 | Blowing and drawing type dust pelletizing system |
| CN210386918U (en) * | 2019-07-02 | 2020-04-24 | 西南科技大学 | Side-suction air-equalizing cover for ventilation and dust removal |
-
2019
- 2019-07-02 CN CN201910588678.9A patent/CN110788104A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0577440A1 (en) * | 1992-07-03 | 1994-01-05 | SOLOMAT S.A. Société dite: | Flame-cutting machine |
| KR20050064997A (en) * | 2003-12-24 | 2005-06-29 | 재단법인 포항산업과학연구원 | Hood device of an electro-galvanizing line |
| CN201125277Y (en) * | 2007-11-13 | 2008-10-01 | 中船第九设计研究院工程有限公司 | Side draught type electroplating groove air exhaust cover |
| CN102268500A (en) * | 2011-08-02 | 2011-12-07 | 姚立猛 | Air suction hood device |
| CN106824964A (en) * | 2017-03-20 | 2017-06-13 | 威尔登环保设备（长沙）有限公司 | Blowing and drawing type dust pelletizing system |
| CN210386918U (en) * | 2019-07-02 | 2020-04-24 | 西南科技大学 | Side-suction air-equalizing cover for ventilation and dust removal |
Non-Patent Citations (1)
| Title |
|---|
| 唐锦芸: "《钢厂精炼车间除尘***改造设计》", 《中国优秀硕士学位论文全文数据库 (工程科技Ⅱ辑)》, 15 October 2018 (2018-10-15), pages 038 - 140 * |
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