CN101487357A - Wind-proof dust-suppression method for open bulk materials stacking field, and its wind-proof dust-suppression net and use - Google Patents
Wind-proof dust-suppression method for open bulk materials stacking field, and its wind-proof dust-suppression net and use Download PDFInfo
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- CN101487357A CN101487357A CNA2008102496275A CN200810249627A CN101487357A CN 101487357 A CN101487357 A CN 101487357A CN A2008102496275 A CNA2008102496275 A CN A2008102496275A CN 200810249627 A CN200810249627 A CN 200810249627A CN 101487357 A CN101487357 A CN 101487357A
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Abstract
The invention relates to a wind and dust resisting method for an open stacking site of bulk materials, a wind and dust resisting net and the application thereof. The method comprises the following steps: a concrete base is built around the material stacking site; a support steel structure is fixed on the concrete base; the support steel structure is provided with net leaves of the wind and dust resisting net; a main flow wind surface is provided with wind resisting net leaves, and other secondary flow wind surfaces are provided with dust resisting net leaves; the height at which the net leaves are arranged is more than the stacking height of the material stack; the opening ratio of the net leaves is 20 percent to 50 percent and the like. 1 to 3 rows of wind resisting net leaves in the middle of the main flow wind surface are provided with a turnover mechanism. Net holes are long holes or elliptic holes, one side of the net hole is punched into a flanging guide fin which has a certain angle and has guide function. The boundary layer separation, the vortex and the permeation flow are eliminated or reduced effectively, the angle of the dust resisting net can be regulated according to wind directions; and the effect of resisting dust, especially secondary blowing dust can be improved greatly. The invention can be widely applied to the open stacking site of bulk materials in ports, coal mines, coal fired power plants, etc.
Description
Technical field
The invention belongs to the wind-proof dust-suppression technical field, more particularly relate to the wind-proof dust-suppression method of open bulk materials stacking field and the improvement and the innovation of wind-proof dust-suppression net and purposes thereof.
Background technology
All there is open bulk materials stacking field in enterprises such as harbour, colliery and iron and steel works, coal-burning power plant, lime and cement material factory.Under wind action, certainly lead to airborne dust and reentrainment of dust.The solid particulate matter of stockpiling and storing in the open mainly contains three kinds of motion states under the wind-force effect: the spiral shell that is called along ground surface moves; Carried by wind, migration is called suspension with the wind; Particle between spiral shell moves and suspends leapt in the air before this, and then the track falling ground along rule is referred to as to quiver.
Airborne dust not only causes the severe contamination to atmospheric environment, and can cause the waste of raw material.Wherein the following micron particles of MP10 and MP10 is suspended in the atmosphere, and other local diffusions of box haul are to the tool harmfulness of atmospheric environment.Thick weather is caused by suspended contaminant often.Monitoring shows that pellet is the main cause that causes 5 grades of pollutions of air.The diameter of pellet is less than 10 microns, and promptly common people can be drawn in the lung by respiratory tract, and is very big to the harm of human body.Meanwhile, airborne dust has also produced traffic and has seriously influenced.
At present, the masses and society are more and more higher to the requirement of air quality.Therefore, imperative to the reentrainment of dust improvement in open-air bulk material yard.
Wind-proof dust-suppression net is the design library part editor and reuse that reduces the strong technology of wind, mainly be installed on the support steel structure by the metal otter board with certain percent opening or establishment, bonding, the nonmetal net sheet of extrusion modling, support steel structure is fixed on the underground concrete basis, cooperates with compositions such as corresponding auxiliary water injector, automatic instrument(s) systems.It is suppressing to be better than traditional watering, the measures such as agent with fixed attention, fabric covering admittedly of spray crust aspect the reentrainment of dust, and under the environmental index of equal conditions, underground storage of output investment ratio and sealing storage are economical, and simple to operation.
But up to now, traditional wind-proof dust-suppression web plate mostly is a plane, and it is still undesirable that its dust suppression particularly suppresses the effect of reentrainment of dust.When windproof net was not set, incoming flow wind quickened upwards to flow along the windward side of heap, produced boundary layer separation on the heap top; And under the effect of adverse pressure gradient, leeward what pile to forming a bigger vortex.The boundary layer separation on top and vortex all can produce bigger airborne dust.After traditional plate windproof net was set, the part of incoming flow wind upwards flowed to be called along the wall of windproof net and climbs stream, and produced at windproof net top and to separate, thereby the zone on the windproof net height degree in the wake zone forms the turbulent shear layer.Some incoming flow wind passes windproof online perforate, behind the consumed energy, continues flow further downstream, is called osmotic flow.Osmotic flow still can produce bigger airborne dust.
In addition, the change that the angle of traditional wind-proof dust-suppression net can not box haul is suitably regulated, and anti-dust effect further is restricted again.
Summary of the invention
Purpose of the present invention just is to overcome above-mentioned shortcoming and defect, and a kind of wind-proof dust-suppression method and wind-proof dust-suppression net and purposes of open bulk materials stacking field is provided.It can control boundary layer separation, vortex and osmotic flow preferably, and the effect that dust suppression particularly suppresses reentrainment of dust is greatly improved.It is solid type that webpage levels off template, and mechanical strength of self and wind loading rating also improve a lot.And the angle of dust-suppression net can box haul change suitably regulate, anti-dust effect is further enhanced.
In order to achieve the above object, wind-proof dust-suppression method of the present invention may further comprise the steps:
(1) bulk materials stacking field surrounding buildings concrete foundation in the open;
(2) fixed support steel work on concrete foundation;
(3) the wind-proof dust-suppression net webpage is installed on support steel structure;
(4) keep out the wind net and block two kinds of structures of dirt net of the wind-proof dust-suppression net webpage of An Zhuaning, the webpage that keeps out the wind is arranged on the main flow wind face, it is strong mainly to work to reduce wind, blocking the dirt webpage is arranged on other time stream wind face, the escape that main interception main flow wind is kicked up dust granules, when change of the wind makes when blocking the dirt webpage and being in the main flow wind direction, block the dirt webpage and just play and reduce the strong effect of wind, the escape that other webpage is then tackled the dust granules of kicking up;
(5) the stacking height of the height of wind-proof dust-suppression net webpage greater than open-air bulk material heap is installed, incoming flow wind produced on the wind-proof dust-suppression net top separate, the turbulent shear layer certain altitude on the heap top because of wake flow forms can not cause airborne dust;
(6) percent opening of wind-proof dust-suppression net webpage is 20%～50%, makes it good thin stream effect, dredges and the wind comes from, and it is carried out water conservancy diversion and rectification, make it turbulent flow is become accurate Laminar Flow by certain orientation, reduce, reduced dust quantity piling the influence of surface, ground surface.
This method also can be fixed with axle with 1～3 gear wind webpage left and right sides, centre that is arranged on the main flow wind face, two bearings about installing and fixing on the relevant position, support steel structure both sides, about axle is installed in two bearings, and this 1～3 gear wind webpage can be driven rotate to suitable angle with driving mechanism main flow wind is played guide functions.
According to the wind-proof dust-suppression net that above-mentioned wind-proof dust-suppression method is made, comprise the concrete foundation that is fixed on around the open-air bulk material heap, the webpage on being fixed on the support steel structure on the concrete foundation and being installed on the support steel structure.1～3 gear wind webpage left and right sides, centre that is arranged on the main flow wind face is fixed with axle, and two bearings about installing and fixing on the relevant position, support steel structure both sides are about axle is installed in two bearings.Also fixedly mount a driven sprocket on the axle, fixedly mounting motor on support steel structure or the concrete foundation, fixedly mounting drive sprocket on the axle of motor.On drive sprocket and the driven sprocket chain drive-belt is installed.
Mesh on the webpage is slotted hole or elliptical aperture, and a side of mesh is stamped into the flange distributing fin, and the flange distributing fin at an angle.Slotted hole or elliptical aperture can be uniform or non-uniform, also can mixed distribution.The flange distributing fin of mesh one side can play guide functions, and the local wind direction that changes is further controlled osmotic flow; Can also improve intensity, the enhancing rigidity of webpage self.When using steel to make webpage, during punching the hole is expected that the punching press bending gets final product to a side, good manufacturability, and save material.
This is a kind of structure of webpage adjustable angle joint.According to wind direction, can be at any time with motor-driven sprocket wheel, chain, axle upset webpage, that is the leeward side of webpage and adverse wind face can regulate according to wind direction, made it the better windproof wind effect that presses down.
The present invention can control boundary layer separation, vortex and osmotic flow preferably, and the effect that dust suppression particularly suppresses reentrainment of dust is greatly improved.The mesh of webpage has the flange distributing fin, and mechanical strength of self and wind loading rating also improve a lot.And the facining the wind and change adjusting that leeward side can box haul of webpage, anti-dust effect is further enhanced.It can be widely used in the open bulk materials stacking field of enterprises such as harbour, colliery, iron and steel works, coal-burning power plant, lime and cement material factory.
Description of drawings
Fig. 1 is the structural representation of dust-break webpage of the present invention.
Fig. 2 is the schematic diagram that has the mesh of flange distributing fin.
Fig. 3 is near the Atmospheric Flow performance plot of bank during for no wind-proof dust-suppression net.
Fig. 4 is provided with near the Atmospheric Flow performance plot the bank behind the wind-proof dust-suppression net.
Fig. 5 is for being provided with computer simulation test schematic diagram behind the wind-proof dust-suppression net.
The specific embodiment
Embodiment 1.A kind of wind-proof dust-suppression method of open bulk materials stacking field.May further comprise the steps:
(1) bulk materials stacking field surrounding buildings concrete foundation in the open;
(2) fixed support steel work on concrete foundation;
(3) the wind-proof dust-suppression net webpage is installed on support steel structure;
(4) keep out the wind net and block two kinds of structures of dirt net of the wind-proof dust-suppression net webpage of An Zhuaning, the webpage that keeps out the wind is arranged on the main flow wind face, it is strong mainly to work to reduce wind, blocking the dirt webpage is arranged on other time stream wind face, the escape that main interception main flow wind is kicked up dust granules, when change of the wind makes when blocking the dirt webpage and being in the main flow wind direction, block the dirt webpage and just play and reduce the strong effect of wind, the escape that other webpage is then tackled the dust granules of kicking up;
(5) the stacking height of the height of wind-proof dust-suppression net webpage greater than open-air bulk material heap is installed, incoming flow wind produced on the wind-proof dust-suppression net top separate, the turbulent shear layer certain altitude on the heap top because of wake flow forms can not cause airborne dust;
(6) percent opening of wind-proof dust-suppression net webpage is 20%～50%, makes it good thin stream effect, dredges and the wind comes from, and it is carried out water conservancy diversion and rectification, make it turbulent flow is become accurate Laminar Flow by certain orientation, reduce, reduced dust quantity piling the influence of surface, ground surface.
Its 1～3 gear wind webpage left and right sides, centre that is arranged on the main flow wind face is fixed with axle, and two bearings about installing and fixing on the relevant position, support steel structure both sides are about axle is installed in two bearings.This 1～3 gear wind webpage can drive and rotate to suitable angle main flow wind is played guide functions.
Consult Fig. 3.During no wind-proof dust-suppression net, incoming flow wind quickens upwards to flow along the windward side of bulk material heap (1), produces boundary layer separation on the heap top; And under the effect of adverse pressure gradient, leeward what pile to forming a bigger vortex; Thereby airborne dust and reentrainment of dust are serious.
Consult Fig. 4.After wind-proof dust-suppression net was set, the part of incoming flow wind upwards flowed to be called along the wall of wind-proof dust-suppression net (2) and climbs stream, and produced at windproof net top and to separate, thereby the zone on the windproof net height degree in the wake zone forms the turbulent shear layer; Some incoming flow wind passes windproof online perforate, behind the consumed energy, continues flow further downstream, is called osmotic flow.
Distinguished and admirable when wind-proof dust-suppression net, separate on the net top.At little percent opening＜20% time, osmotic flow is subjected to stopping of recirculating zone, also the recirculating zone can occur at the stockpile downwind side simultaneously.But when percent opening〉65% the time, because it is enough big to see through the air quantity of wind-proof dust-suppression net, wind-proof dust-suppression net does not almost have any protection effect.Percent opening is 20%～50% preferably.
Wind-proof dust-suppression net with identical percent opening, the mesh distribution situation also can influence the protection effect.With regard to the wind-proof dust-suppression net that percent opening is 40%, when the top of wind-proof dust-suppression net or bottom had different percent openings, average pressure and pressure oscillation were risen.
For the perforate wind-proof dust-suppression net, begin that from the top turbulent shear layer is just arranged.If percent opening＜20% recirculating zone can occur in the back of wind-proof dust-suppression net.With the increase of percent opening, in the back of wind-proof dust-suppression net a bigger vortex can appear.When reaching certain value, find to have two vortexs to exist.When being worth greater than this, because the enhancing of osmotic flow, propelling fluid flows forward, does not almost have big vortex to produce.
Present embodiment can be controlled boundary layer separation, vortex and osmotic flow preferably, and the effect that dust suppression particularly suppresses reentrainment of dust all is greatly improved.
Embodiment 2.A kind of wind-proof dust-suppression net is as Fig. 1～shown in Figure 2.Comprise the concrete foundation that is fixed on around the open-air bulk material heap, be fixed on support steel structure 2 on the concrete foundation, be installed in the webpage on the support steel structure 2.It is arranged on 3 gear wind webpages, 3 left and right sides, centre on the main flow wind face and is fixed with axle 1, and two bearings 4 about installing and fixing on the relevant position, support steel structure 2 both sides are about axle 1 is installed in two bearings 4.Also fixedly mounting driven sprocket 5 on the axle 1.Fixedly mount motor 6 on the support steel structure 2, fixedly mounting drive sprocket 7 on the axle of motor 6.On drive sprocket 7 and the driven sprocket 5 chain drive-belt 8 is installed.Mesh 9 on its webpage 3 is a slotted hole, and a side of mesh 9 is stamped into flange distributing fin 10, and flange distributing fin 10 is 30 degree angles.
This is a kind of structure of adjustable angle joint of webpage 3.According to wind direction, can make webpage 3 be adjusted in a certain angle at any time with motor 6 drive sprockets 7, chain 8, driven sprocket 5, axle 1 and webpage 3, the better windproof wind effect that presses down is arranged.
The strong position of main flow wind of whole wind-proof dust-suppression net is provided with keep out the wind webpage 3, the more effectively dust suppression of 3 row's adjustable angle joints simultaneously.
Fig. 5 is the schematic diagram that computer simulation test behind this wind-proof dust-suppression net is set.11 is incoming flow wind among the figure, and 12 for to have the wind-proof dust-suppression net that has mesh on webpage and the webpage, and the height of wind-proof dust-suppression net 12 is H, and 14 is open-air bulk material heap, and 13 is its windward side, and 15 is its leeward side.The distance of wind-proof dust-suppression net 12 and open-air bulk material heap 14 is G.X, Y are respectively horizontal, axis of ordinates.
Embodiment 2 has controlled boundary layer separation, vortex and osmotic flow preferably, and the effect that dust suppression particularly suppresses reentrainment of dust is greatly improved.The mesh of webpage has the flange distributing fin, and mechanical strength of self and wind loading rating also improve a lot.And the facining the wind and change adjusting that leeward side can box haul of webpage, anti-dust effect is further enhanced.According to the simulation of computer, the maximum wind velocity on the stockpile windward side can be reduced to 3 meter per seconds by 7 meter per seconds, and effect is very remarkable.It can be widely used in the open bulk materials stacking field of enterprises such as harbour, colliery, iron and steel works, coal-burning power plant, lime and cement material factory.
Claims (5)
1. the wind-proof dust-suppression method of an open bulk materials stacking field may further comprise the steps:
(1) bulk materials stacking field surrounding buildings concrete foundation in the open;
(2) fixed support steel work on concrete foundation;
(3) the wind-proof dust-suppression net webpage is installed on support steel structure;
It is characterized in that further comprising the steps of:
(4) keep out the wind net and block two kinds of structures of dirt net of the wind-proof dust-suppression net webpage of An Zhuaning, the webpage that keeps out the wind is arranged on the main flow wind face, it is strong mainly to work to reduce wind, blocking the dirt webpage is arranged on other time stream wind face, the escape that main interception main flow wind is kicked up dust granules, when change of the wind makes when blocking the dirt webpage and being in the main flow wind direction, block the dirt webpage and just play and reduce the strong effect of wind, the escape that other webpage is then tackled the dust granules of kicking up;
(5) the stacking height of the height of wind-proof dust-suppression net webpage greater than open-air bulk material heap is installed, incoming flow wind produced on the wind-proof dust-suppression net top separate, the turbulent shear layer certain altitude on the heap top because of wake flow forms can not cause airborne dust;
(6) percent opening of wind-proof dust-suppression net webpage is 20%～50%, makes it good thin stream effect, dredges and the wind comes from, and it is carried out water conservancy diversion and rectification, make it turbulent flow is become accurate Laminar Flow by certain orientation, reduce, reduced dust quantity piling the influence of surface, ground surface.
2. according to the wind-proof dust-suppression method of the described open bulk materials stacking field of claim 1,1～3 gear wind webpage left and right sides, centre that it is characterized in that being arranged on the main flow wind face is fixed with axle, two bearings about installing and fixing on the relevant position, support steel structure both sides, about axle is installed in two bearings, this 1～3 gear wind webpage can drive and rotate to suitable angle main flow wind is played guide functions.
3. wind-proof dust-suppression net of making according to the described wind-proof dust-suppression method of claim 1, comprise and be fixed on open-air bulk material heap concrete foundation on every side, be fixed on the support steel structure on the concrete foundation, webpage on being installed on the support steel structure, 1～3 gear wind webpage left and right sides, centre that it is characterized in that being arranged on the main flow wind face is fixed with axle, two bearings about installing and fixing on the relevant position, support steel structure both sides, about axle is installed in two bearings, also fixedly mounting a driven sprocket on the axle, fixedly mounting motor on support steel structure or the concrete foundation, fixedly mounting drive sprocket on the axle of motor, on drive sprocket and the driven sprocket chain drive-belt is being installed.
4. according to the described wind-proof dust-suppression net of claim 3, it is characterized in that the mesh on the webpage is slotted hole or elliptical aperture, a side of mesh is stamped into the flange distributing fin, and the flange distributing fin at an angle.
5. the purposes according to the wind-proof dust-suppression method of the described open bulk materials stacking field of claim 1 is characterized in that being used for the open bulk materials stacking of harbour, colliery, iron and steel works, coal-burning power plant, lime and cement material factory to suppress to reduce airborne dust.
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| CN2008102496275A CN101487357B (en) | 2008-12-25 | 2008-12-25 | Wind-proof dust-suppression method for open bulk materials stacking field, and its wind-proof dust-suppression net and use |
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| CN2008102496275A CN101487357B (en) | 2008-12-25 | 2008-12-25 | Wind-proof dust-suppression method for open bulk materials stacking field, and its wind-proof dust-suppression net and use |
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| CN108801582A (en) * | 2018-08-31 | 2018-11-13 | 天津大学 | Anti-wind net dust suppression mechanism demonstrating experiment device and its experimental method |
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| CN109339569A (en) * | 2018-09-21 | 2019-02-15 | 胡萍 | A kind of architectural engineering enclosing structure hindering dirt formula |
| CN110056082A (en) * | 2019-05-08 | 2019-07-26 | 重庆交通大学 | Roofs can be reduced and be vortexed the wind proof house to be formed |
| CN110056082B (en) * | 2019-05-08 | 2020-08-25 | 重庆交通大学 | Wind-resistant house capable of reducing vortex formation on surface of roof |
| CN110158493A (en) * | 2019-06-26 | 2019-08-23 | 兰州有色冶金设计研究院有限公司 | The Combined anti-wind canopy of the heavens and method |
| CN110424281A (en) * | 2019-07-22 | 2019-11-08 | 山西尚风抑风墙科技有限公司 | A kind of tunnel face Piston Action Wind Dust Improvement device |
| CN110453618A (en) * | 2019-07-22 | 2019-11-15 | 山西尚风抑风墙科技有限公司 | A kind of tunnel face Piston Action Wind Dust Improvement method |
| CN111036748A (en) * | 2019-11-29 | 2020-04-21 | 宣城久悠谷电子科技有限公司 | Environment-friendly sand-proof dust suppression net processing machine |
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