CN104984597B - A kind of air swirl parallel combination demister and application - Google Patents

A kind of air swirl parallel combination demister and application Download PDF

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Publication number
CN104984597B
CN104984597B CN201510449698.XA CN201510449698A CN104984597B CN 104984597 B CN104984597 B CN 104984597B CN 201510449698 A CN201510449698 A CN 201510449698A CN 104984597 B CN104984597 B CN 104984597B
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cylinder
air swirl
diameter
flow
expanding
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CN104984597A (en
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王硕
王大勇
黄虎成
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AEROSPACE ENVIRONMENTAL ENGINEERING Co Ltd
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AEROSPACE ENVIRONMENTAL ENGINEERING Co Ltd
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Abstract

The present invention relates to a kind of air swirl parallel combination demister, described device includes one or more air swirl demisting unit and plugging plate, the axis of described air swirl demisting unit is that vertical direction is arranged, and described air swirl demisting unit includes cylinder, guide vane, sealing plate, deflector, converging transition, flow-expanding section and draining section.Apparatus of the present invention are owing to being provided with one or more air swirl demisting unit and plugging plate, improve working flow rate, reduce limit grain diameter, the limit grain diameter that can make device trapping drop is less than 15 microns, thus reached to reduce the effect of demister outlet droplet concentration, avoid the loss of water, meanwhile, it also avoid the secondary pollution causing air.

Description

A kind of air swirl parallel combination demister and application
Technical field
The invention belongs to environmental technology field, relate to the flue gas demister of absorption tower outlet in Wet Flue Gas Desulfurization Technology And application, especially a kind of air swirl parallel combination demister and application.
Background technology
In flue gas desulfurization technique, desulfurization technology in a wet process is most widely used.Its nucleus equipment is absorption tower, through inhaling Receive the flue gas after tower washing, can be with substantial amounts of drop, with fume emission.This had both caused the loss of a large amount of water, meanwhile, in water The particulate matter dissolved and suspend also can together enter air, causes air secondary to pollute.
In order to reduce the discharge of drop, prior art means are to install demister additional at top, absorption tower.Existing demister with Flap form is in the majority, and it is preferable except fog effect, and limit grain diameter can reach 25 microns.Because it is restricted by reentrainment, Its operating rate can not be too high, therefore thinks to reduce its limit grain diameter further the most difficult.
If it is desired to improve further except fog effect, reduce limit grain diameter, need to be processed by combinatorial principle, further Improve flowing velocity.
By retrieval, not yet find the patent publication us relevant to present patent application.
Summary of the invention
In place of it is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of new demister form, utilize gas Dynamic eddy flow principle work, improves working flow rate, reduces limit grain diameter, thus reduces demister outlet droplet concentration The air swirl parallel combination demister of effect, this device can apply in the flue gas after removing wet process of FGD contained Free state drop aspect in.
It is an object of the invention to be achieved through the following technical solutions:
A kind of air swirl parallel combination demister, described device includes that one or more air swirl is except mist Unit and plugging plate, the axis of described air swirl demisting unit is that vertical direction is arranged;
When described air swirl demisting unit is one, the top of this air swirl demisting unit and the outer rim of bottom all connect It is equipped with plugging plate;
When described air swirl demisting unit is two or more, this air swirl demisting unit in same level in also Row interval is arranged, and the parallel setting in axis of each air swirl unit, between each air swirl demisting unit Bottom is all sealed connected together by plugging plate with top, mutually in top and the bottom of outermost air swirl demisting unit Outer rim be all connected with being provided with plugging plate.
And, described air swirl demisting unit includes cylinder, deflector, guide vane, sealing plate, converging transition, expansion stream Section and draining section, described deflector, guide vane, converging transition and flow-expanding section be set in turn in cylinder from the bottom to top, described row Water section is coaxially disposed on the cylinder above flow-expanding section, and described deflector is inclined and mounted on the bottom in cylinder;
Described guide vane is made up of multiple plane blades, and the plurality of plane blade is with the circularly symmetric cloth of center line of cylinder Putting, each plane blade all has angle with horizontal direction, and each plane blade all can in the projection of the cross-sectional direction of cylinder Whole cross section is all covered, and has overlap;
Described sealing plate is flat board or curved slab, and this sealing plate is arranged at the axle center of guide vane;
Described converging transition is taper pipe, is coaxially disposed with cylinder, converging transition reduced diameter from bottom to top, bottom with Cylinder inboard wall is smoothly connected together, and the diameter of bottom is identical with the diameter of cylinder, the diameter phase of the diameter at top and flow-expanding section With;
Described flow-expanding section is taper pipe, is coaxially disposed with cylinder, and flow-expanding section diameter from bottom to top is gradually increased, top with Cylinder inboard wall is smoothly connected together, and the diameter at top is identical with the diameter of cylinder, and the diameter of bottom is straight with the top of converging transition Footpath is identical, and the straight tube being coaxially disposed with cylinder by between described converging transition and flow-expanding section links together;
Arranging draining section on the cylinder of the lower section at nearly cylinder top, described draining section includes dash annulus and water leg, The inner end of described dash annulus is coaxially disposed in cylinder inboard wall, the inner end of the dash annulus that this is located in cylinder inboard wall Cross section is inversed l-shaped, and the outer end of this dash annulus is inclined upwardly from inner end extends to outside cylinder through cylinder inboard wall, The outside bent angle forming arc transition of cylinder also bends towards vertically downward direction, and the side of dash annulus is connected with cylinder and sets Putting, opposite side and the cylinder interval of the dash annulus arranged that should be connected with cylinder are arranged, the dash annulus being arranged at outside cylinder Lower section and cylinder are coaxially provided with water leg, and the diameter of this water leg is more than the maximum gauge of the dash annulus outside cylinder, and this catchments Groove is provided with drainage arrangement, discharges for the liquid will collected in water leg.
And, described cylinder is straight bucket circular tube structure, a length of 500mm to 3000mm, and internal diameter is 100mm to 1000mm, Inner wall smooth, uses the material that coefficient of friction is low.
And, the material that described coefficient of friction is low is plastic products.
And, described water leg is provided with drainage arrangement for arrange osculum or drainpipe on water leg.
And, described in be sequentially connected and connect the guide vane of setting, sealing plate, deflector, converging transition, flow-expanding section and draining section It is respectively provided with one or more layers, forms arranged in series.
And, described air swirl parallel combination demister is arranged in the equipment of wet process of FGD.
And, described air swirl parallel combination demister is arranged in flue gas desulfurization device absorptive tower or is arranged on suction After receiving tower in single device.
Contained by the air swirl parallel combination demister as above flue gas after removing wet process of FGD Application in the aspect of free state drop.
Advantages of the present invention and good effect be:
1, apparatus of the present invention make use of the principle of inertial separation, under certain operating rate, makes droplet at inertial centrifugal Under the effect of power to barrel flow, compare traditional flap demister, due to the fact that its flowing velocity by axially translated for portion Cut to, thus entirety adds its working flow rate, and makes axial velocity be unlikely to too high.Therefore, the liquid by this device is made Drip limit grain diameter to reduce, it is possible to make the limit grain diameter of device trapping drop be less than 15 microns, thus reached to reduce except mist The effect of device outlet droplet concentration, it is to avoid the loss of water, meanwhile, it also avoid the secondary pollution causing air.
2, apparatus of the present invention due to its flowing velocity higher, bucket inner surface formed uniform water film, therefore this device is to cleaning Less demanding, relatively conventional chevron mist eliminator, reduce the intensity of flushing water, saved the energy.
Accompanying drawing explanation
Fig. 1 is that the structure of air swirl parallel combination device of the present invention connects partial sectional view;
Fig. 2 is that the structure of air swirl demisting unit in Fig. 1 connects enlarged diagram;
Fig. 3 is guide vane and the structure connecting shaft side schematic diagram of sealing plate in Fig. 2.
Detailed description of the invention
As a example by accompanying drawing embodiment, the invention will be further described below, and following example are illustrative, no It is determinate, it is impossible to limit protection scope of the present invention with this.
Structure, annexation and the method not described in detail in patent of the present invention, all can be understood as the public affairs in this area Know general knowledge.
A kind of air swirl parallel combination demister, as it is shown in figure 1, described device includes one or more gas Dynamic vortex-flow and defrosting unit 2 and plugging plate 3, the axis of described air swirl demisting unit is that vertical direction is arranged;
When described air swirl demisting unit is one, the top of this air swirl demisting unit and the outer rim of bottom all connect Being equipped with plugging plate, air swirl demisting unit can be by the inwall phase of this plugging plate with the reaction unit 1 installing this device It is sealingly mounted at together, makes flue gas inner barrel from air swirl demisting unit to pass through from bottom to up;
When described air swirl demisting unit is two or more, this air swirl demisting unit in same level in also Row interval is arranged, and the parallel setting in axis of each air swirl unit, between each air swirl demisting unit Bottom is all sealed connected together by plugging plate with top, mutually in top and the bottom of outermost air swirl demisting unit Outer rim be all connected with being provided with plugging plate, outermost air swirl demisting unit can by plugging plate with installation this device anti- The inwall answering device is sealingly mounted at together mutually, makes flue gas to lead to from air swirl demisting unit inner barrel from bottom to up Cross.
As in figure 2 it is shown, described air swirl demisting unit include cylinder 4, deflector 11, guide vane 10, sealing plate 9, Converging transition 8, flow-expanding section 6 and draining section 5, described deflector, guide vane, converging transition and flow-expanding section are set in turn in from the bottom to top In cylinder, described draining section is coaxially disposed on the cylinder above flow-expanding section, and described deflector is inclined and mounted on the end in cylinder Portion, this deflector carries out rectification to the air-flow entering guide vane;
As it is shown on figure 3, described guide vane is made up of multiple plane blades 16, the plurality of plane blade is with the center of cylinder The circularly symmetric layout of line, each plane blade all has angle with horizontal direction, and each plane blade is in the cross-sectional direction of cylinder Projection all whole cross section all can be covered, and have overlap;
Described sealing plate is flat board or curved slab, and this sealing plate is arranged at the axle center of guide vane, makes multiple plane leaf Sheet forms the uniform of circle symmetry around sealing plate, and the effect of sealing plate is closed stream lending blade center region, is allowed to flow field more sharp In gas-liquid separation;
Described converging transition is taper pipe, is coaxially disposed with cylinder, converging transition reduced diameter from bottom to top, bottom with Cylinder inboard wall is smoothly connected together, and the diameter of bottom is identical with the diameter of cylinder, the diameter phase of the diameter at top and flow-expanding section With;
Described flow-expanding section is taper pipe, is coaxially disposed with cylinder, and flow-expanding section diameter from bottom to top is gradually increased, top with Cylinder inboard wall is smoothly connected together, and the diameter at top is identical with the diameter of cylinder, and the diameter of bottom is straight with the top of converging transition Footpath is identical, and the straight tube 7 being coaxially disposed with cylinder by between described converging transition and flow-expanding section links together;
Arranging draining section on the cylinder of the lower section at nearly cylinder top, described draining section includes that dash annulus (is not marked in figure Number) and water leg 12, the inner end 15 of described dash annulus is coaxially disposed in cylinder inboard wall, and this is located at the gear in cylinder inboard wall The cross section of the inner end of water annulus is inversed l-shaped, and the outer end 13 of this dash annulus is from inner end through cylinder inboard wall upwards Tilt to extend to outside cylinder, outside cylinder, form the bent angle 14 of arc transition and bend towards vertically downward direction, dash annulus Side be connected with cylinder setting, the opposite side of the dash annulus arranged that should be connected with cylinder and the setting of cylinder interval, if Being coaxially provided with water leg with cylinder below the dash annulus being placed in outside cylinder, the diameter of this water leg is more than the dash circle outside cylinder The maximum gauge of ring, the drop that this water leg flows down on the dash annulus that surge drum is external, this water leg is provided with row Water device, discharges for the liquid will collected in water leg, such as, arranges osculum or drainpipe on water leg.
In the present embodiment, described cylinder is straight bucket circular tube structure, a length of 500mm to 3000mm, internal diameter be 100mm extremely 1000mm, inner wall smooth, use the material that coefficient of friction is low, such as plastic products, such anti-adhesive properties is good, reduces flushing water Use.
In the present embodiment, it is sequentially connected described in and connects the guide vane of setting, sealing plate, deflector, converging transition, flow-expanding section All can one or more layers be set according to actual needs with draining section, form arranged in series.
Air swirl demister, can be modified according to the burden requirement of different operating, changes element number, deflector Arrange parameter, blade arranges parameter and quantity, sealing plate form, converging transition flow velocity etc., to reach different load, and different removing effects Rate and otherwise limit particle diameter purpose.
Air swirl demister, the material that coefficient of friction can be used low is made, such as plastic products, such anti-adhesive properties Good, reduce the use of flushing water.
The using method of air swirl parallel combination demister of the present invention is as follows:
Air swirl parallel combination demister of the present invention can be installed in use flue gas desulfurization device absorptive tower or It is arranged on behind absorption tower in single device or in the reaction unit 1 of individually deentrainment tower or similar functions, flue gas is from bottom to top Flowing, this device is applied in the middle of the equipment of wet process of FGD, and effect is contained in the flue gas after removing wet process of FGD Free state drop, apparatus of the present invention can make the limit grain diameter of device trapping drop less than 15 microns.
The operation principle of air swirl parallel combination demister of the present invention is as follows:
Processed flue gas enters cylinder from bottom to top, through the rectification of deflector, enters guide vane section, at guide vane Effect under, formed spinning updraft, so make air-flow velocity attitude convert formed tangential velocity, make the drop in air-flow Obtain centrifugal force, move to barrel direction.The center of guide vane, arranges sealing plate, and the effect of sealing plate is confined bed Stream blade center region, is allowed to flow field and is more conducive to gas-liquid separation.Swirling eddy moves upward, and enters converging transition and flow-expanding section, gas Circulation footpath reduces, and flue gas flow rate is accelerated, and makes drop separation effect improve, and makes some droplets produce and gather, is combined into big grain The drop in footpath, thus be easier to by follow-up removing, through above step, major part drop has been removed.If according to removing The requirement of efficiency, it is impossible to meet needs, then can increase some groups of guide vanes, sealing plate, deflector, converging transition, flow-expanding sections. At cylinder close to top exit position, arranging draining section, water leg has drainage arrangement, can setting by osculum and drainpipe Putting, the liquid collected by water leg is discharged.

Claims (8)

1. an air swirl parallel combination demister, it is characterised in that: described device includes one or more gas Dynamic vortex-flow and defrosting unit and plugging plate, the axis of described air swirl demisting unit is that vertical direction is arranged;
When described air swirl demisting unit is one, the top of this air swirl demisting unit and the outer rim of bottom are all connected with setting There is plugging plate;
When described air swirl demisting unit is two or more, this air swirl demisting unit in same level between side by side Every setting, the parallel setting in axis of each air swirl unit, the bottom between each air swirl demisting unit All it is sealed connected together mutually by plugging plate with top, outside the top and bottom of outermost air swirl demisting unit Edge is all connected with being provided with plugging plate;
Described air swirl demisting unit includes cylinder, deflector, guide vane, sealing plate, converging transition, flow-expanding section and draining Section, described deflector, guide vane, converging transition and flow-expanding section are set in turn in cylinder from the bottom to top, and described draining section is coaxial Being arranged on the cylinder above flow-expanding section, described deflector is inclined and mounted on the bottom in cylinder;
Described guide vane is made up of multiple plane blades, the plurality of plane blade with the circularly symmetric layout of center line of cylinder, Each plane blade all has angle with horizontal direction, and each plane blade all can be by whole in the projection of the cross-sectional direction of cylinder Individual cross section all covers, and has overlap;
Described sealing plate is flat board or curved slab, and this sealing plate is arranged at the axle center of guide vane;
Described converging transition is taper pipe, is coaxially disposed with cylinder, converging transition reduced diameter from bottom to top, bottom and cylinder Inner wall smooth links together, and the diameter of bottom is identical with the diameter of cylinder, and the diameter at top is identical with the diameter of flow-expanding section;
Described flow-expanding section is taper pipe, is coaxially disposed with cylinder, and flow-expanding section diameter from bottom to top is gradually increased, top and cylinder Inner wall smooth links together, and the diameter at top is identical with the diameter of cylinder, the top diameter phase of the diameter of bottom and converging transition With, the straight tube being coaxially disposed with cylinder by between described converging transition and flow-expanding section links together;
Arranging draining section on the cylinder of the lower section at nearly cylinder top, described draining section includes dash annulus and water leg, described The inner end of dash annulus is coaxially disposed in cylinder inboard wall, the cross section of the inner end of the dash annulus being located in cylinder inboard wall In inversed l-shaped, the outer end of this dash annulus is inclined upwardly from inner end extends to outside cylinder, outside cylinder through cylinder inboard wall Portion forms the bent angle of arc transition and bends towards vertically downward direction, and the side of dash annulus is connected with cylinder setting, this with Cylinder is connected opposite side and the cylinder interval setting of the dash annulus arranged, with cylinder below the dash annulus being arranged at outside cylinder Body is coaxially provided with water leg, and the diameter of this water leg is more than the maximum gauge of the dash annulus outside cylinder, and this water leg is provided with Drainage arrangement, discharges for the liquid will collected in water leg.
Air swirl parallel combination demister the most according to claim 1, it is characterised in that: described cylinder is straight bucket circle Tubular construction, a length of 500mm to 3000mm, internal diameter is 100mm to 1000mm, inner wall smooth, uses the material that coefficient of friction is low.
Air swirl parallel combination demister the most according to claim 2, it is characterised in that: described coefficient of friction is low Material is plastic products.
Air swirl parallel combination demister the most according to claim 1, it is characterised in that: described water leg is provided with Drainage arrangement is the osculum or drainpipe arranged on water leg.
5. according to the air swirl parallel combination demister described in any one of Claims 1-4, it is characterised in that: described depend on Secondary guide vane, sealing plate, deflector, converging transition, flow-expanding section and the draining section arranged that be connected is respectively provided with one or more layers, shape Become arranged in series.
6. according to the air swirl parallel combination demister described in any one of Claims 1-4, it is characterised in that: described gas Dynamic eddy flow parallel combination demister is arranged in the equipment of wet process of FGD.
Air swirl parallel combination demister the most according to claim 6, it is characterised in that: described air swirl is in parallel After combining in demister is arranged on flue gas desulfurization device absorptive tower or being arranged on absorption tower in single device.
8. the air swirl parallel combination demister as described in any one of claim 1 to 7 is after removing wet process of FGD Flue gas in contained free state drop aspect in application.
CN201510449698.XA 2015-07-27 2015-07-27 A kind of air swirl parallel combination demister and application Active CN104984597B (en)

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CN105251309A (en) * 2015-11-27 2016-01-20 江苏中立环保科技有限公司 Efficient energy-saving static dust and smoke remover and treatment method thereof
CN205182372U (en) * 2015-12-04 2016-04-27 中电投远达环保工程有限公司 Honeycomb defroster
CN105275542B (en) * 2015-12-04 2019-01-11 广西玉柴机器股份有限公司 Rebreather of engine
CN105457398B (en) * 2015-12-31 2017-12-19 铜陵有色金属集团股份有限公司铜冠冶化分公司 The gas-liquid cyclone separator of organic amine salt drop and absorption tower in separable flue gas
CN105457454B (en) * 2015-12-31 2019-01-25 铜陵有色金属集团股份有限公司铜冠冶化分公司 Separate and recover monoblock type absorption tower and the method for carrying organic amine salt in flue gas secretly
CN105597472B (en) * 2016-01-07 2019-10-08 航天环境工程有限公司 A kind of air swirl combination demister
CN105944547B (en) * 2016-06-20 2019-01-08 航天环境工程有限公司 A kind of flue gas minimum discharge absorbs tower apparatus and application
CN108067047B (en) * 2016-11-11 2020-08-11 中国石油化工股份有限公司抚顺石油化工研究院 High-efficient defogging equipment
CN109731458A (en) * 2019-03-06 2019-05-10 刘振 A kind of glass reinforced plastic desulfurization tower

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CN203648373U (en) * 2013-12-24 2014-06-18 航天环境工程有限公司 Flow dividing and grading desulfurization and dust removing device for sintering flue gas
CN204911024U (en) * 2015-07-27 2015-12-30 航天环境工程有限公司 Pneumatic whirl parallel combination defogging device

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CN101791505A (en) * 2010-01-13 2010-08-04 东南大学 Baffle type cyclone demister
CN203648373U (en) * 2013-12-24 2014-06-18 航天环境工程有限公司 Flow dividing and grading desulfurization and dust removing device for sintering flue gas
CN204911024U (en) * 2015-07-27 2015-12-30 航天环境工程有限公司 Pneumatic whirl parallel combination defogging device

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